Hi seat-north,
When the Q&A forum doesn't allow you to post, then in most cases you have to solve the problem accessing the forum, and for that support Site Issue Forum is here, not to be used at any time for anything else.
Please request that the admin check your account. I have no access to that database. I will move this post to Q&A.
The SketchUp import documentation is here:
https://help.maxon.net/c4d/2026/en-us/Default.htm#html/FSKPIMPORT.html?TocPath=Configuration%257CPreferences%257CImport%252FExport%257CSketchUp%2520Importer%257C_____0
And has two more sites if you click on the little folder on the right.
Fingers crossed that the access is soon available.
All the best