When Upgrading from RUT9_R_00.07.01.4 to RUT9_R_00.07.02.3 or RUT9_R_00.07.02.4 with option Keep all Settings selected, the Loading Screen wont Disappear.
Only the Status > Overview page is affected.
By changing the URL manually it is possible to open other Menues without any further Problems.
As a Workaround you can Upgrade the FW without keeping your settings and uploading the Backup File later.
However, This is not Possible for Romote Devices