We have SharePoint 2016 on premise. In our document libraries, most are set to "Use the server default (Open in the browser)" selection for the default open behavior.
Up until about a week ago, all documents opened as expected in the online method (Word Online, Powerpoint Online, etc.). Now we are having an issue with Word and Powerpoint files not opening in the browser. We are getting the following error -
What what would cause this to happen?
Let me know if additional information is needed for troubleshooting
UPDATE - Now Word Online is working as expected but PowerPoint and Excel are not working - the PowerPoint error is consistent with the above error but the Excel error looks like this -