Compass Error- Outside the Course Content

I am trying to connect to MongoDB through Compass in my organisation with Unvalidate(inSecure ) as SSL setting and getting the below error

“Connection 3 to host Servername:Port closed”

With the SSL setting as System CA/Atlas Deployment , getting the below error

“Could not connect to MongoDB on specified host and port”

Please let me know if you need any further information. Can I also ask such questions in this forum or do we have any other forum where I can post my questions outside the course ?

Thanks in advance.