Stuck creating iSCSI Target at 0% after upgrading to OS5

I updated the NAS (WDMyCloudEX4100) to latest version 5.11.112 from OS3 and its stuck on creating iSCSI target at 0%. The other NAS that I updated didn’t experience this problem. Does anyone have suggestion on what to do?
I tried restarting several times and also turn on/off iSCSI but its still stuck. I have 14TB data which I don’t want to lose.

The following article addresses this issue.

My Cloud OS 5: iSCSI Target Cannot Connect or Create

Answer ID 30255