When you click the Export button and see an error message saying “Some files are not properly loaded”, it means that one or more files in the left Media library have not finished loading or failed to load. In this case, please wait a little longer or click Retry to reload the files.
If you encounter the situation shown in the screenshot, where no file name is displayed and the file does not appear in the Media library, the issue is likely related to transition sound effects.
To fix this, open each transition and check whether any sound effect fails to load. If you find one, simply replace it with another music track or turn off the transition sound effect, and the issue should be resolved.
For example:
