I tried this endpoint, but it returns the error shown below: https://<adminservicecatalog-url>/services/<serviceName>/MapServer/refresh
{'status': 'error', 'messages': ['Index 1 out of bounds for length 1'], 'code': 500}
Having the same problem here but then with /updateTiles
Wondered if you ever got any further with this @FrankMatzen ?
We have checked into the config of the service, and made sure that the CRS and the bounding box/extent in the right CRS was. Service loads otherwise fine, layerIDs also OK.