Version 2.5.0 does not work either. I tried version 2.2.0 and it works fine
Could you check the WooCommerce logs to see if there are errors with the?wpo-wcpdf?or?fatal-errors?prefix? If so, please share the logs with us You’ll find the logs under?WooCommerce > Status > Logs.
This will be very useful to try to understand why the latest version is not working for you.
I hope that the Arabic language will be officially supported in the add-on without the need for other add-ons. I hope for that in the next release.
The reason why Arabic is not supported by default is that we use dompdf as PDF engine, which does not support right-to-left scripts. That is why we created this extension which switches the PDF engine to mPDF in order to provide support to RTL.