Thank you for the post.
Obvious question first:
Is anyone else with a FileMaker Pro installation or a FileMaker Go device connected to the hosted file?
"copied over my Filemaker pro 13"
Could you expand on this part? Did you reinstall from a disc or download? Was Apple Migration Assistant used or the App copied and pasted to the new machine?
Regardless of the previous install method used (because of the error), try reinstalling with your disc or download.
Please keep me updated with any progress.
I saw this error message occasionally. Quit Filemaker and restart again in my case mostly solved this issue.
You're using FM13.0 v2. There's a chance that this issue is solved with current version FM13.0v3. I would recommend to always use newest versions
(Expect for major-updates like FM12.0v0)
Same for FMGO on your iPhone