Mpdf 7 version is required with PHP7 (https://github.com/mpdf/mpdf/releases/tag/v7.0.0).
New version uses composer to install the library and has namespaces, code structure cleanup, introduction of PSR compliant file structure and autoloading.
There are changes in the API - mpdf class name is changed to Mpdf , config variables are given in array and other changes as shown in the link.
Needs work
2.0
Code
Not all content is available!
It's likely this issue predates Contrib.social: some issue and comment data are missing.
In able the to save the pdf based on the pdf_using_mpdf_pdf_save_option
Drupal 7 is end of live.
If you want to use PDF using mPDF → for your Drupal 10/11 please checkout new version 3.x → .