UMAPI Sync Issues

I was wondering if anyone can help me out with this issue. I was recently tasked with getting SSO setup for Spark with Premium Features, SSO works great, but the problem is how do we keep our 14,000 users up to date without manual intervention and dealing with CSV files. So we moved onto implementing the User Sync Tool.

I went through the SSO, User Sync Tool, and Adobe I/O setup guides and things are working fairly well. We are at the point where we can sync our LDAP users from AD into the admin console (They appear under directory users). However when we add the "--process-groups" switch to these commands below (Also tried preserve instead of exclude in both commands) it goes through the ldap read/load fine but as soon it gets to the Start Sync with UMAPI it fails.

"Python user-sync.pex -t --users all --process-groups --adobe-only-user-action exclude" or "Python user-sync.pex --users group "Adobe Sync Test" --process-groups --adobe-only-user-action exclude"

Here is the output I'm getting when it starts the Sync with UMAPI:

2018-09-25 09:49:36 6088 INFO processor - ---------- Start Sync with UMAPI ---------------------------

2018-09-25 09:49:36 6088 DEBUG urllib3.connectionpool - Starting new HTTPS connection (1): usermanagement.adobe.io:443

2018-09-25 09:49:38 6088 DEBUG urllib3.connectionpool - https://usermanagement.adobe.io:443 "GET /v2/usermanagement/groups/ORGIDREMOVED@AdobeOrg/0 HTTP/1.1" 400 105

2018-09-25 09:49:38 6088 ERROR main - Unhandled exception

Anyone have any ideas on what I can try next? I've recopied all the .yml config files to make sure there are no formatting issues like tabs instead of spaces, and verified all the info matches what's in the Adobe I/o and Admin consoles.

Thanks!