Based on the testing and verification results, the following actions are recommended:
Alternative Source: Some Discord communities dedicated to Assetto Corsa modding (e.g., “SOL Official” or “CSP Discuss”) maintain pinned messages with direct SOL 2.1.3 download links. Use these only if you trust the moderators. sol 2.1.3 download
Cause: Another service (often old SOL 2.0) occupies port 7171 (default).
Fix: Change port in /etc/sol/sol.conf: Based on the testing and verification results, the
sol_port = 8181