My File Refuses to Save

Any time I try to save, save as, or publish my score I'm met with an error.

I've read multiple other forum posts from a while back with this same issue, and I followed the advice they gave (save as instead of save, save to a different folder, publish it [publishing worked earlier, but now even that won't work]) but it hasn't worked. If there is any possible solutions I am missing, please let me know. I am new to Musescore so it is very likely that it's an issue on my end.

Any help would be greatly appreciated because I don't want to lose my progress :(