Cannot access my cloud EX2

I owned a WD My Cloud EX2 Ultra and tried to upgrade to OS5.

After OS5 completed, I can access my filed via network but not via My Cloud : https://mycloudex2ultra/

Please advise.

Best regards,
{REMOVED}

Hello,

Please refer to the following KBA article: https://support-en.wd.com/app/answers/detail/a_id/30015