Decklink 3d stop recognising by mac

Today suddenly my card Decklink 3d ext had been stop working after restarting my computer
I checked that with the other computer
but the Blackmagic_Desktop_Video_10.11.4 keep saying check your device if its connected to your system
No Desktop video device detected
is there any way that I can update my firmware?
is there any LED on this card to show that card has any problem?
fan on the card still working and some chips are warm when after a while
Can you help me pls?
My Macos are 10.12.6 and I try to upgrade them to the latest version

Could it be that there was some security update that went active after the reboot of your mac? A lot of people had the same issues when they updated Macos to Sierra and above.

There is some fix to come around that security issue found in the manual and on the forum.

Could it be that there was some security update that went active after the reboot of your mac? A lot of people had the same issues when they updated Macos to Sierra and above.

There is some fix to come around that security issue found in the manual and on the forum.

Thanks a lot for your help
unfortunately, I couldn't find any relevant post
Could you kindly give me a hint how can I find that, please?
much appreciated

Frequently Asked Questions - Capture, Playbackand Stream >Point 4.05

Thank you very much
But it doesnt work for me
any other suggestion?