Many of you knows Oracle deprecated the EM db console [ EMCA ] and introduced EM Express in 12c..
I have Oracle enterprise linux 6 in VMware and successfully installed 12c release 1 but seems to be when I open EM always got "sec_error_ca_cert_invalid" in my firebox.
I was thinking this could be hitting BUG so I have applied latest bundle patch in 12c but still got same error
By looking 1943645.1. This error was hitting bug in firebox 31 & 32 release.. So this workaround was solved my problem..