The report says:
The date entered is not in the expected format described at [Key:start_date](https://wiki.openstreetmap.org/wiki/Key:start_date)
But the actual problem tag is:
opening_date Not known
I saw some examples using {{0}} to populate a substitution in a string e.g.:
|
title = T_('{0} parking not integrated', 'BNLS'), |
But I wasn't clear how to get the specific tag this has triggered on or I may have attempted a fix myself.