Drobo 5N2 is rebooting bevore finishing strating process, login not possible


My Drobo is in a endless rebooting loop and im not able to get out of the starting process.


-Power on the Drobo.
-Normal starting process.
-Drobo is shown in the DroboDashboard (Lock is unlocked)
-Message: “The Drobo is starting up. Please wait, this Process can takes several minutes”
-Im able to klick on: "Status, Capacity, Shares & Toos
-DroboDR, DroboApps & Drobo Settings… is greyed out (not available)

this loop is not ending.

can someone help me?

Dashboard Firmware: 4.1.4
Drobo Firmware 3.4.2