Empty XML, AAF files issue - Roundrip to Premiere

I have an issue when trying to finish a roundtrip back to Premiere with my finished graded files. I have a timeline with the graded files, no audio. I have tried to export it using the Premiere XML and AVID AAF and even Pro Tools preset and every time the file that should be an XML or AAF is 0 bytes and has no file type. I am using Davinci Resolve 16. Does anybody have a solution to this problem? I need to urgently deliver these files. Thanks.

Well, if this helps anyone the issue was the timeline was two characters too long with a colon symbol, specifically :9.