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Rather than re-explaining the whole process that got me here, I'm hoping I can just reference this question: Can't access specific admin pages

In that question, I was hitting errors while trying to update Drupal. I updated composer as well.

After clearing caches, restarting PHP and restarting my docksal project, the errors went away, and the admin seems usable except the specific thing I need

A backup tar was lost during all of that, so I'm trying to create a new back-up, so I'm back to safety. But, when I go to the export page, here: page /admin/config/development/configuration/full/export, I click the export button, and it gives me a fatal error:

Fatal error: Class 'Archive_Tar' not found in /var/www/docroot/core/lib/Drupal/Core/Archiver/ArchiveTar.php on line 8

When I look in the log, I see this message:

The file /tmp/config.tar.gz was not deleted because it does not exist.

This is Drupal 8.7.3 , if that helps.

I would just do drush archive-backup, if I could. But that option has ben removed.

Not sure if I gave enough info, above. Let me know.

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  • Your installation is probably incomplete. The pear/archive_tar package is a dependency of Drupal and it is missing or your composer autoloader is not returning classes.
    – mradcliffe
    Jun 26 '19 at 11:35
  • I just tried installing pear/archive_tar with composer, and I got the same errors I keep getting for everything - "Your requirements could not be resolved to an installable set of packages." And it always references egulias/email-validator . It did show "Using version ^1.4 for pear/archive_tar" ... so, I'm assuming my issue is the non-returning classes? Any thoughts on how to repair that?
    – turpentyne
    Jun 26 '19 at 15:15
  • If composer is failing, then the vendor, core and other drupal-TYPE directories won't be updated. That's probably why you think you're updated, but may not actually be.
    – mradcliffe
    Jun 26 '19 at 19:10

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