Lightroom will not let me save edited photos all of the sudden, but will let me save original?

Hello there! I literally used lightroom a couple of days ago and had NO issues. Today I go in, edit a photo and go to save it (I click the Share button, make sure the settings are where I want them via Custom, click Export 1 Photo) and it thinks about it for a few moments and then gives me this error that I will include a screenshot of in the post. I've restarted my computer. I've restarted lightroom and also restarted it again while holding down alt and ctrl to reset the lightroom settings. Still won't work. Is lightroom just on the fritz right now? I've used it for years and have never experienced this.  Please help, I would seriously appreciate it haha. I'm losing my mind over here and have photos for a client to do