Just got this error message on 2024 tax return. Just changing the name or trying to save it to a different library on my hard drive didn't work. I was able to save it to USB stick under a different name. Didn't try using the same name for that so that may have worked. I did try one other method successfully. I went into the online selection (just to the right of FILE) and selected check for updates. I had already updated when I first entered Turbo tax.
It required to save before checking and some miracle this seemed to solve the problem of the error message.
Good Luck.
