On the global listens feed, when clicking on the link picture of an un-mapped listen, the Pop Up to manually map it to an MBID opens, but when selecting an MBID and submitting, the mapping fails because the MSID is not included in the API call.

There are two solutions:

1. Disable the MBID mapping on the global feed (or, when there is no MSID in general)
2. Properly include the MSID with the API call on the global feed.