Call to member function isAllowed() on true

I have resolved locally this error, but can't upload patch or MR in this entity_pdf issue . because that is related to views_bulk_operations module. you can make changes in Drupal\views_bulk_operations\Service\ViewsBulkOperationsActionProcessor->process() function

replace this line
if ($accessResult->isAllowed() === FALSE) {

to

// Only call isAllowed() if $accessResult is an instance of AccessResultInterface
if ($accessResult instanceof AccessResultInterface && $accessResult->isAllowed() === FALSE) {

and replace this line '@reason' => $accessResult->getReason(), to '@reason' => $reason,

Seems like an issue for the "views_bulk_operations" module?
Feel free te re-open if changes are needed in "entity_pdf".