Error

The environment is not allowed

File: /home/avclient01/www/public_html/public/kirby/src/Http/Environment.php
Line: 251

Trace:
#0 /home/avclient01/www/public_html/public/kirby/src/Http/Environment.php(183): Kirby\Http\Environment->detectAllowed()
#1 /home/avclient01/www/public_html/public/kirby/src/Http/Environment.php(110): Kirby\Http\Environment->detect()
#2 /home/avclient01/www/public_html/public/kirby/src/Cms/App.php(1066): Kirby\Http\Environment->__construct()
#3 /home/avclient01/www/public_html/public/kirby/src/Cms/App.php(109): Kirby\Cms\App->optionsFromEnvironment()
#4 /home/avclient01/www/public_html/public/index.php(8): Kirby\Cms\App->__construct()
#5 {main}