The upgrade, in Drupal 7.58, was done some months ago. We have an annual event so I'm only noticing this after trying to set up the new event, but anonymous users can no longer view any events. The error is the following:
Sorry, due to an error, we are unable to fulfill your request at the moment. You may want to contact your administrator or service provider with more details about what action you were performing when this occurred. API permission check failed for Event/get call; insufficient permission: require access CiviCRM and access CiviEvent and view event info
There were no changes to permissions, and this worked before. I double checked, and the anonymous access via CiviEvent is still on.