SgtTowelie

^^^ THIS SOLVED MY PROBLEM ^^^ I can attest to the quoted solution. I had actually moved some long-named bodyslide files into a different sub-directory (in the bodyslide folder), which ended up (unknowingly) adding length to the file paths. Adding like 15 character folder name to the file path was enough to give me this major grief of an issue. To test to see if this is your problem too, simply move your Data folder outside of skyrim directory and then see if Creation Kit opens for you. It did for me. So then I started putting back sub folders in Data to narrow it down further. I found my caliente tools folder was causing the CK error. And then, just as blippyp said, I looked for some long files names. And yup. It was them. Easy for me I can just rename my bodyslide files so they're shorter. ALSO CHECK SOLUTION ABOVE MY POST HERE because it is a different solution and will help some other people This solution also helped me, be advised that some folder structures do not get cleared out when disabling mods in Vortex, you have to manually delete/rename the folder structures that are causing the issue.

Now I'm getting a fatal error: (0) FATAL ERROR The Creation Kit encountered a fatal error and has crashed. Reason: An invalid parameter was sent to a function that considers invalid parameters fatal (0x5041524D). did you mange to resolve this?