My files app has stop working after updating my iPad 10th generation 2024 to IOS 18.1

I have been using the file app for my uni work ever since I got the device a couple of months ago and have no problems. Ever since I updated the device the app has stopped working e.g. editing files, opening work, PowerPoint and PDFs and also renaming files.

I have tried updating the app, the device and shutting down the device

The only thing I can think about is that these files that are causing me trouble are on my Microsoft OneDrive, but as I said its been working for the last couple of months