Hi @Wendy Schuppen,
Thank you for posting your question on the Microsoft Q&A forum and for taking the time to share such a detailed explanation along with screenshots, that information is extremely helpful.
Based on my research, several other users have reported the same behavior following a recent update. Given the troubleshooting steps you’ve already completed, this strongly points to a product-side issue related to the new “Object Picker” experience, rather than anything misconfigured on your end.
In the meantime, there are a couple of possible workarounds you may want to try:
1/ Use the direct library URL:
- Open the document library in a separate browser tab.
- Copy the full library URL (not just the root site URL).
- Go to Quick Links > Add link, choose from a link, paste the exact library URL, and press Enter.
2/ Link to a folder within the library instead of the root:
Some users have found that linking directly to a subfolder works as expected, whereas linking to the library root does not.
If neither of these workarounds resolves the issue or meets your expectations, the recommended next step would be to open a support ticket directly with Microsoft Support, as they have access to the backend tools required to investigate this further.
You can create a support ticket by signing in to the Microsoft 365 admin center and following the steps in this link: Get support for Microsoft 365 for business to create a support ticket from the admin center or by calling phone support to contact Microsoft Support: Customer service phone numbers. If you don't have admin privileges, you can ask your IT admin to do it on your behalf.
Alternatively, you can learn how to find your administrator through this link: How do I find my Microsoft 365 admin?.
Note: We appreciate your understanding regarding the scope of support available through this forum. As moderators, our role is to provide general guidance and assist with common troubleshooting steps. While we do not have access to internal systems or administrative tools necessary to resolve specific account or backend-related issues, we will continue to do our best to support you within the scope of our responsibilities.
I hope this information helps move things forward. Please feel free to let me know how it goes, or if you need any further assistance. I’ll be happy to help.
I look forward to your reply.
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