Unknown error. (Ref. 5021) System Volume

[IceWolf]

I am unable to complete the wizard configuration of my newly bought Asustor AS5304T NAS due to Error found Unknown error. (Ref. 5021) message during wizard. I was able to update the ADM to version 3.4.7.RFO2 using auto update. After that I tried to use the wizard to complete the initial configuration of the NAS but the error occurs on the second step (it creates partition but stops on system volume). I tried with removing the drives as suggested but still the same issue. Seems I'm not the only one with this problem viewtopic.php?f=97&t=10502&hilit=5021 and https://www.amazon.com/gp/customer-revi ... B07PW9DV56 but was not able to find any solution to this problem. I opened a ticket with the support but would like to know if there is a way for me to restore previous ADM version somehow or is there any other way I can fix this?

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