Hi Barry,
There is no system alias been maintained for the below mentioned service.
ZTILE_NUMBER_SRV_0001
Goto transaction /n/IWFND/MAINT_SERVICE - Choose the OData Service and Add System Alias to it.
Once it is added make sure your Odata is active.
If the issue still persists, provide the logs from /n/IWFND/ERROR_LOG and Browser logs(F12 - Developer Tools).
Thanks,
JC