Recently i migrated my MS sql server.
And I changed in my mydbr_config.php DB_HOST to my new MS sql server.
Now all works well except sometimes i get this error:
Connection failed: Unable to connect to database
re-run the installation
Re-running the installation might resolve the problem.
If I press F5 (reload) in browser everything is working correct.
I tried to re-run instaliations - nothing changed.