Can’t delete any files. Error: file could not be delete. I had tried to change wi-fi to cellular data, but it didn’t work.
Sorry for the delay in response.
Are you still facing this issue? If yes, try following troubleshooting steps:
1- Signing out from the app, sign back in and try again.
2- If that doesn't work, rebooting iPad/iPhone if you haven't already, and try again.
3- Check if an update is available for Acrobat Reader by launching App Store.
Feel free to update this discussion if you need any help.