UIDocumentBrowserViewController with GDrive - never worked

I have a document based app and use the UIDocumentBrowserViewController. All works well with iCloud, OneDrive etc. but I've never had it work with GDrive. I can see the documents but any attempt to create or open a document fails. Haven't seen any other app work either EXCEPT the Pages app (so it IS possible.)


Anyone else made this work?

UIDocumentBrowserViewController with GDrive - never worked
 
 
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