A. 1. Review formatting guidelines: Check the app's documentation for any specific formatting requirements for uploaded files. Adjust your document accordingly. 2. Use a plain text editor: If formatting issues persist, copy the text into a plain text editor (like Notepad) to remove any complex formatting, then save and upload again.

B. 3. Test with different files: Try uploading different files to see if the issue is specific to certain documents or a general problem with the app.