Issue description
Usually, after modifying anything on the Site Configuration page, the Save button changes to blue so that the modification can be saved.
But in certain circumstances if you modify something on the page, the save button displays as inactive (greyed out). However the Discard button displays as normal.
It is not possible to save the modifications, such as changing a start view for example.
The issue is related to the "maximum map tile zoom level" setting. The limit of this setting at an instance level and site level are different.
At the instance level the setting can be more than 30, depending on the map tile you use in the instance.
At the site level, the setting needs to be less than 30, otherwise the Save button is blocked.
When creating a new site, this setting in the site by default takes the value from the instance, so if the instance setting is more than 30, than it would be the same value in the site, and this would will block the save function in the site configuration.
Troubleshooting procedure
Change the "maximum map tile zoom level" to no more than 30, then the "save" function would be unblocked.