- Check the owner of the file: Sometimes, when you are sharing files in Microsoft Classroom, an owner must be specified. Make sure that an owner is assigned for all files that you are attempting to assign grades.
- Verify permissions: Check the file permissions to make sure that all members have permission to access the file.
- Check your file type: Make sure that the file type is an acceptable file type. If the file type is not acceptable for Microsoft Classroom, you may need to convert or export it to an acceptable file type.
- Check if the file is locked: