Hi @Anonymous
From what you have described it sounds as though you only have the Document Manager Role enabled for certain projects. Please see the article linked below which looks at how to resolve this issue.
In BIM 360 Field, you are missing rights to upload or work with project library documents
As per the solution of this article, when are in the edit member dialog box as shown in the image below ensure that the Document Manager right is selected. Then once you have signed out and back into the Library Importer you should now see the project which you have changed your rights to shown. This process will need to be done for each project individually.

I hope this resolves this for you, please let me know if you require further assistance.
If this response has answered your question then please click Accept as Solution on this post so others in the community can find them easily.
Kind Regards
Benjamin Peake
Product Support Specialist
Autodesk, Inc.
