Hi,
Thank you for reaching out, and sorry for the inconvenience.
The issue may be related to a missing PHP extension on your server. The message displaying as COM_SPPAGEBUILDER_MEDIA_MANAGER_MEDIA_DE... and the inability to delete images from the Media Library can occur when required PHP image processing functions are unavailable.
Could you please contact your hosting provider and ask them to verify that the PHP GD extension is installed and enabled on your server? This extension is required for image handling operations in SP Page Builder.
Once the extension has been enabled, please let us know if the issue persists, and we'll be happy to investigate further.
Best regards