Need helps with exporting audios

Hi the community,
I encounter problems with the audios' exporting. This happens to any sheets, so I don't think it's the sheet that causes problem.
Whenever I try to export an MP3 file, It either create a file with no sounds in it, or crash the program when reaching 99% of the progress. Similarly, whenever I try to export my sheet to any format of audio files other than MP3 and MIDI, It says "Cannot write into [file path]." and terminate the process. Export of MIDI and graphic formats seems to be working just fine, though. The problem suddenly appeared today. I have no problem exporting any file before.

I have tried:
Repairing Musescore using the installer.
Re-checking that all of the changes in synthesizers have been saved to score.
Rebooting the computer.
Closing other programs to lessen the burden of the disk.
Removing all custom soundfiles in the sheets.

I'm using:
Windows 10 home version.
Latest version of Musescore.
Custom soundfiles and changed synthesizer configs.

Thanks in advance for any help.