TLS certificate error on WEB/Tracking connection

[RobertOl1]

Hey adobe campaign classic 7 wizards, i'm in bit of a bind here.

Suddenly we can't upload pictures to our tracking / web server.

we get this error 

IOB-090020 Error in SSL library: 'IOB-090013 error:1416F086:SSL routines:tls_process_server_certificate:certificate verify failed (code 337047686)'
XSV-350059 Unable to upload the images to the tracking servers.

So it seems that TLS cert, is the problem.

It is build in amazon work spcaces.

We have a load balancer added, but i have checked the load balancer, the application server, the web/tracking server and the RDS database, and everyone seems to be with a valid TLS certificate

It worked fine in December.

Any clue to where to look next ? 

Many Thanks

Robert.

[RobertOl1]

i keep finding threads on OS / local SSL/tls certicate, but i can't find any documentation on how to update a ssl/tls certificate on a on-prem system windows on aws.

If anyone can help with that id would love to try to see if that fixes the issue.