I've installed Laravel Horizon on my application and deployed to production. I've followed all of the instructions and the server is running on PHP version 7.1.8 (using Forge & Envoyer).
When I load Horizon, it shows infinite spinners. Check Dev Tools, it shows an error calling api/stats and api/workload.
When I look at the error I see
FatalThrowableError Parse error: syntax error, unexpected '=' in WaitTimeCalculator.php (line 75)
This is on line 75 of WaitTimeCalculator.php
[$connection, $queueName] = explode(':', $queue, 2);