SSL certificate error

I have FreeNAS mini 2.0 with
Processor- Intel Atom CPU C2750 @ 2.40GHz (8 cores)
Memory - 16GiB
Hard disk - 4*1TB WD
FreeNAS 11.2-release

I am trying to create SSL internal certificate for security purpose.I had created one internal CA(System> CA > ADD > fill the information) & one internal certificate(System > Certificates > ADD > Signing certificate authority/given CA name )

I had also export CA and add it authorities in my browser(Mozilla 64.0.2 and chrome 71.0.3578.98) still it...

SSL certificate error