Have you tried saving to a different directory? It could be running into a write protected folder, such as trying to save to the install folder or the hidden ProgramData folder. You might try reinstalling as an administrator.
I have tried to save to USB, to a directory on the desktop and in c: – so i don’t think that it can be permissions but good thinking.
It seems to be a general issues at this point … i have tried reboot, new file, and so on …
i may have figured out what the workflow is anyway to cause it to happen … i am using inkscape and selecting all, then convert object to path and saving as svg. It seems like some of my older files when i was not using inkscape however using corel draw and illustrator works …