Generating invoices generates an error with version >= 0.12.6 of wkhtmltopdf.
Full detail in https://github.com/civicrm/civicrm-core/pull/23055 - am creating this to track that issue as the patch is not mergeable as is
Full detail in https://github.com/civicrm/civicrm-core/pull/23055 - am creating this to track that issue as the patch is not mergeable as is