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I am using Drupal 9.2.7 on XAMPP 7.3.29, with PHP 7.4.21 on Windows 10 Home.

I tried to create a custom module which allows global JavaScript and CSS (effective in all webpages in my website), by creating the root/modules/globalrs directory with the following files.

globalrs.info.yml

name: globalrs
type: module
core_version_requirement: ^8 || ^9
description: 'globalrs'
libraries:
  - globalrs/globalrs

globalrs.module

function globalrs_preprocess_page(&$variables) {
  $variables['#attached']['library'][] = 'globalrs/globalrs';
}

globalrs.libraries.yml

globalrs:
  js:
    behavior.js: {}
  css:
    theme:
      style.css: {}

style.css

* {
    background: red;
}

My problem is that the website won't load, instead the following error appears.

The website encountered an unexpected error. Please try again later.

Even if I delete the module directory and flush all caches (the cache_ tables, the *cachetags` table, and the browser's cache), the website still has that error. Since that error is generic, I don't know how to start to solve the problem.

It may be that the problem started after I have added $settings['rebuild_access'] = TRUE; to the end of /sites/default/settings.php, saved the file, and then navigated in my web browser to localhost/example.com/core/rebuild.php, where I got the following error.

Fatal error: Uncaught PDOException: SQLSTATE[HY000] [1044] Access denied for user 'example.com'@'localhost' to database 'example.com'

I believe that the problem happened sometime when I tried to restore a backup of the website to a new empty database with the same name which was registered as associated with the database user (or appeared to be such) but actually wasn't.

Drupal 9.2.7 on XAMPP 7.3.29  , 7.4.21 on Windows 10 Home.

I tried to create a custom module which allows global JavaScript and CSS (effective in all webpages in my website), by creating the directory root/modules/globalrs with the following files:

globalrs.info.yml

name: globalrs
type: module
core_version_requirement: ^8 || ^9
description: 'globalrs'
libraries:
  - globalrs/globalrs

globalrs.module

function globalrs_preprocess_page(&$variables) {
  $variables['#attached']['library'][] = 'globalrs/globalrs';
}

globalrs.libraries.yml

globalrs:
  js:
    behavior.js: {}
  css:
    theme:
      style.css: {}

style.css

* {
    background: red;
}

My problem

My problem is that the website won't load, instead the following error appears:

The website encountered an unexpected error. Please try again later.

Even if I delete the module directory and flush all caches (flushing all cache_ tables as well as the cachetags table, and flushing the browser's cache, the website still has that error;
Since that error is generic, I don't know how to start to solve the problem.

A bug as a possible reason

It may be that the problem started after I have added $settings['rebuild_access'] = TRUE; to the end of /sites/default/settings.php, saved the file and then navigated in my web browser to localhost/example.com/core/rebuild.php, where I got the following error:

Fatal error: Uncaught PDOException: SQLSTATE[HY000] [1044] Access denied for user 'example.com'@'localhost' to database 'example.com' in

Edit (removing the rest of the error messages because this is caused by an unrelated error while restoring a backup):

I believe that the problem happened sometime when I tried to restore a backup of the website to a new empty database with the same name which was registered as associated with the database user (or appeared to be such) but actually wasn't

Update - solution

I paste this here after Clive deleted my answer:

I revoked all database-specific privileges that the database user had on the database with the same name and then re-granted these database-specific privileges¹ to that user; I could then access the website.

Drupal 9.2.7 on XAMPP 7.3.29  , 7.4.21 on Windows 10 Home.

I tried to create a custom module which allows global JavaScript and CSS (effective in all webpages in my website), by creating the directory root/modules/globalrs with the following files:

globalrs.info.yml

name: globalrs
type: module
core_version_requirement: ^8 || ^9
description: 'globalrs'
libraries:
  - globalrs/globalrs

globalrs.module

function globalrs_preprocess_page(&$variables) {
  $variables['#attached']['library'][] = 'globalrs/globalrs';
}

globalrs.libraries.yml

globalrs:
  js:
    behavior.js: {}
  css:
    theme:
      style.css: {}

style.css

* {
    background: red;
}

My problem

My problem is that the website won't load, instead the following error appears:

The website encountered an unexpected error. Please try again later.

Even if I delete the module directory and flush all caches (flushing all cache_ tables as well as the cachetags table, and flushing the browser's cache, the website still has that error;
Since that error is generic, I don't know how to start to solve the problem.

A bug as a possible reason

It may be that the problem started after I have added $settings['rebuild_access'] = TRUE; to the end of /sites/default/settings.php, saved the file and then navigated in my web browser to localhost/example.com/core/rebuild.php, where I got the following error:

Fatal error: Uncaught PDOException: SQLSTATE[HY000] [1044] Access denied for user 'example.com'@'localhost' to database 'example.com' in

Edit (removing the rest of the error messages because this is caused by an unrelated error while restoring a backup):

I believe that the problem happened sometime when I tried to restore a backup of the website to a new empty database with the same name which was registered as associated with the database user (or appeared to be such) but actually wasn't

Update - solution

I paste this here after Clive deleted my answer:

I revoked all database-specific privileges that the database user had on the database with the same name and then re-granted these database-specific privileges¹ to that user; I could then access the website.

I am using Drupal 9.2.7 on XAMPP 7.3.29, with PHP 7.4.21 on Windows 10 Home.

I tried to create a custom module which allows global JavaScript and CSS (effective in all webpages in my website), by creating the root/modules/globalrs directory with the following files.

globalrs.info.yml

name: globalrs
type: module
core_version_requirement: ^8 || ^9
description: 'globalrs'
libraries:
  - globalrs/globalrs

globalrs.module

function globalrs_preprocess_page(&$variables) {
  $variables['#attached']['library'][] = 'globalrs/globalrs';
}

globalrs.libraries.yml

globalrs:
  js:
    behavior.js: {}
  css:
    theme:
      style.css: {}

style.css

* {
    background: red;
}

My problem is that the website won't load, instead the following error appears.

The website encountered an unexpected error. Please try again later.

Even if I delete the module directory and flush all caches (the cache_ tables, the *cachetags` table, and the browser's cache), the website still has that error. Since that error is generic, I don't know how to start to solve the problem.

It may be that the problem started after I have added $settings['rebuild_access'] = TRUE; to the end of /sites/default/settings.php, saved the file, and then navigated in my web browser to localhost/example.com/core/rebuild.php, where I got the following error.

Fatal error: Uncaught PDOException: SQLSTATE[HY000] [1044] Access denied for user 'example.com'@'localhost' to database 'example.com'

I believe that the problem happened sometime when I tried to restore a backup of the website to a new empty database with the same name which was registered as associated with the database user (or appeared to be such) but actually wasn't.

Drupal 9.2.7 on XAMPP 7.3.29 , 7.4.21 on Windows 10 Home.

I tried to create a custom module which allows global JavaScript and CSS (effective in all webpages in my website), by creating the directory root/modules/globalrs with the following files:

globalrs.info.yml

name: globalrs
type: module
core_version_requirement: ^8 || ^9
description: 'globalrs'
libraries:
  - globalrs/globalrs

globalrs.module

function globalrs_preprocess_page(&$variables) {
  $variables['#attached']['library'][] = 'globalrs/globalrs';
}

globalrs.libraries.yml

globalrs:
  js:
    behavior.js: {}
  css:
    theme:
      style.css: {}

style.css

* {
    background: red;
}

My problem

My problem is that the website won't load, instead the following error appears:

The website encountered an unexpected error. Please try again later.

Even if I delete the module directory and flush all caches (flushing all cache_ tables as well as the cachetags table, and flushing the browser's cache, the website still has that error;
Since that error is generic, I don't know how to start to solve the problem.

A bug as a possible reason

It may be that the problem started after I have added $settings['rebuild_access'] = TRUE; to the end of /sites/default/settings.php, saved the file and then navigated in my web browser to localhost/example.com/core/rebuild.php, where I got the following error:

Fatal error: Uncaught PDOException: SQLSTATE[HY000] [1044] Access denied for user 'example.com'@'localhost' to database 'example.com' in

Edit (removing the rest of the error messages because this is caused by an unrelated error while restoring a backup):

I believe that the problem happened sometime when I tried to restore a backup of the website to a new empty database with the same name which was registered as associated with the database user (or appeared to be such) but actually wasn't

Drupal 9.2.7 on XAMPP 7.3.29 , 7.4.21 on Windows 10 Home.

I tried to create a custom module which allows global JavaScript and CSS (effective in all webpages in my website), by creating the directory root/modules/globalrs with the following files:

globalrs.info.yml

name: globalrs
type: module
core_version_requirement: ^8 || ^9
description: 'globalrs'
libraries:
  - globalrs/globalrs

globalrs.module

function globalrs_preprocess_page(&$variables) {
  $variables['#attached']['library'][] = 'globalrs/globalrs';
}

globalrs.libraries.yml

globalrs:
  js:
    behavior.js: {}
  css:
    theme:
      style.css: {}

style.css

* {
    background: red;
}

My problem

My problem is that the website won't load, instead the following error appears:

The website encountered an unexpected error. Please try again later.

Even if I delete the module directory and flush all caches (flushing all cache_ tables as well as the cachetags table, and flushing the browser's cache, the website still has that error;
Since that error is generic, I don't know how to start to solve the problem.

A bug as a possible reason

It may be that the problem started after I have added $settings['rebuild_access'] = TRUE; to the end of /sites/default/settings.php, saved the file and then navigated in my web browser to localhost/example.com/core/rebuild.php, where I got the following error:

Fatal error: Uncaught PDOException: SQLSTATE[HY000] [1044] Access denied for user 'example.com'@'localhost' to database 'example.com' in

Edit (removing the rest of the error messages because this is caused by an unrelated error while restoring a backup):

I believe that the problem happened sometime when I tried to restore a backup of the website to a new empty database with the same name which was registered as associated with the database user (or appeared to be such) but actually wasn't

Update - solution

I paste this here after Clive deleted my answer:

I revoked all database-specific privileges that the database user had on the database with the same name and then re-granted these database-specific privileges¹ to that user; I could then access the website.