I've uploaded a MP4-update of this track:
https://tm.mania-exchange.com/tracks/27215/tickle-the-chicken-pf-possible
The MP3-flag disappeared and everything looked good.

Now the "This track was created with ManiaPlanet 3. It's likely it won't load in ManiaPlanet 4!" message is back.

When I try to update the track again I get this message:

Unexpected Runtime Error
Something went wrong:
Update issue #1.


Thanks for any help.

Thanks for the report. Can you link the map to us via dropbox or something?

Actually, can you just upload it again to a new map page.... and we'll move the file over to your old map page.

Either way works.

Here is a link to the track:
https://www.mediafire.com/?mplwxnc5n88r0lg

Thank you very much!

Should be fixed now, thanks.

(i.e. I've fixed an issue that causes corrupted maps not being able to be updated, maps that are in a corrupted state will not be fixed automatically, though.)

The corruption is probably caused by a partial rollback I had to do yesterday.

Thank you Yoshi!