Store the self-signed certificate as trustworthy with the clients

 In Edge

1. Go to the agent on the client PC
2. Ignore the “Invalid Certificate” warning and continue
3. Log in to the agent
4. Click on warning signs in the address bar
5. Show certificate
6. Save certificate (intermediate location)
7. Install certificate (in Trusted Root Certificates) for Local Machine

Note

The Firefox browser does not work in this case. The reason: Firefox has its own certificate store and does not use the Windows Certificate Store.