I'm running Drupal Core 9.3.7, with basically the default set up. The Basic HTML editor is CKEditor. If I include an image in a page, that image is not shown when I view the page; on inspection, it is actually there, but with the
height="16" width="16" attributes, and a title that says:
This image has been removed. For security reasons, only images from the local domain are allowed
The image is in the local domain (the relative path is /files/inline-images/Picture%201.png); it was literally uploaded in the content editor. If I put in the URL of the image into the browser, it works. It doesn't seem an upload or a permission issue.
If I go to Configuration » Text formats and editors » Basic HTML » Configure and deselect Restrict images to this site, the images appear.
Any help would be much appreciated. I'm a complete Drupal newbie.