Can TLS/SSL version incompatibility cause a 'PRTG SSL Certificate Connection Timed Out' error, and how can I resolve this?

Yes, TLS/SSL version incompatibility can be a cause. PRTG's probe might be attempting to use a TLS version that the target server doesn't support, or vice-versa. To resolve this, you can modify the TLS/SSL settings in your PRTG sensor (if options exist) to match the target server's supported versions. Review the target server's configuration and ensure that PRTG and server use a common TLS version (e.g., TLS 1.2 or TLS 1.3). Incorrect SSL settings at the sensor can lead to connection timeouts.