Did you check your PHP Server logs? Usually this happens if some php extension is not enabled for example. Or if you are running a very outdated PHP version.
I am also experiencing this. Enabling debugging outputs the following error message:
Warning: Attempt to read property “login” on null in /<redacted>/public_html/wp-content/plugins/wp-mpdf/wp-mpdf.php on line 455
Fatal error: Declaration of Psr\Log\AbstractLogger::emergency(Stringable|string $message, array $context = []): void must be compatible with Psr\Log\LoggerInterface::emergency($message, array $context = []) in /<redacted>/public_html/wp-content/plugins/wp-mpdf/vendor/psr/log/src/LoggerTrait.php on line 23
What PHP version are you currently using?
I am on PHP 8.1.27. Thanks for investigating!
Ok I am in the process of releasing version 3.8.3 that downgrades psr/log back to version 1. Let me know if that fixes your problem after updating.
I can confirm that 3.8.3 solves the issue on my end. Thanks again!
No problem. Glad it was an easy fix of downgrading a dependency.