1. Check the file type and make sure the application you are using supports it.
2. If you have multiple versions of the same application installed, make sure you are using the one with the latest version.
3. Restart the application that you were using.
4. Uninstall and reinstall the application you were using.
5. Check your internet connection if you were trying to open a file from the cloud.
6. Ensure that the OneDrive files are synced on all your devices.
7. Reach out to the customer support team to investigate or file a ticket.