Everytime i try to save, i get this.
Insufficient Permissions is probably the giveaway. This suggests that you installed SU by double clicking the Installer.
You need to Right click on it and select Run as admin for it to get the folder permission correct.
You can do that now and choose Repair when given the option.
i’ve had sketchup for many years without ever having this problem. i did not change any settings before i got the problem either. I installed skethup make 2017 quite a few years ago, so i don’t see how the installer could be the couse of the problem now.
Edit: seems like it works again now. I didn’t change anything.