One of my accounts is the owner, and when I try to manage my shared folder from that account or any other I can't change the sharing. It happens in other browsers and in private mode.
Thank you for letting me know.
Since the owner account gets the same error in different browsers and InPrivate mode, this does not appear to be a browser issue.
From the owner account, please open OneDrive > select the folder > “Manage access” and try “Stop sharing” or remove the existing sharing link completely, then create a new sharing link afterward. Microsoft lists these as the supported ways to reset access:
https://support.microsoft.com/en-us/onedrive/sharepoint/manage-sharing-and-permissions-in-onedrive-and-sharepoint
If “Stop sharing” also gives the same “d is null” error, please let me know. That would point more toward an issue with the folder's sharing permissions on the OneDrive side.
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Thanks!