LogicException: Settings can not be serialized.

@ethan - Great find, it looks like mpdf needed to have the temp location explicitly set to avoid having it use the vendor location which was causing permission issues on certain environments like Acquia Platform. This lead to a serialization error because the logger function was trying to print out the entire exception.

I've updated the logger to use $e->getMessage() and now pull in the temp location via filesystem and have also cleaned up some of the types.

Thanks again, going to leave this open for a bit for testing.

Unfortunately it looks like mPDF uses FPDI which does not work on PDFs above v1.4 (at least the free version). Updating MR to use GhostScript instead which should have increased performance and works on 1.7+.

PDF metadata patches and modules now work with Drupal 10 and PHP 8.1