I had a call from one of my users today to say his database was just closing down as he clicked a button.
I got his front and back end files and ran them on a PC with Office 2010, they worked fine, but his Office 365 has been updated today and he has the problem on all his PC's.
I tried the front/backend files on two PC's I have that are running Office 365 and they too have the same issue.
It seems like Microsoft has broken things.
Is anyone else having issues after today's update?
Regards, Dennis
UPDATE: This mentions that the recent Office 365 update fixes problems in Excel, Outlook and Word, what it does not mention is that it broke Access!
https://www.neowin.net/news/microsoft-365-apps-build-1512820224-resolves-issues-with-excel-outlook-and-word/
UPDATE 2:
I managed to program around the main issue I was having, however I have just seen messages to say Microsoft have fixed it, I just tried the original database and it seems to be working fine. Thanks to everyone who posted their experiences here, it was very helpful.