( ! ) Warning: date_default_timezone_get(): It is not safe to rely on the system's timezone settings. You are *required* to use the date.timezone setting or the date_default_timezone_set() function. In case you used any of those methods and you are still getting this warning, you most likely misspelled the timezone identifier. We selected the timezone 'UTC' for now, but please set date.timezone to select your timezone. in /var/www/html/vendor/monolog/monolog/src/Monolog/Logger.php on line 317
Call Stack
#TimeMemoryFunctionLocation
10.0002238440{main}( ).../index.php:0
20.0058776808Minify\App->runServer( ).../index.php:8
30.01031198432Minify->serve( ).../App.php:286
40.01031204104Minify_Controller_MinApp->createConfiguration( ).../Minify.php:229
50.01461234056Monolog\Logger->error( ).../MinApp.php:159
60.01461234792Monolog\Logger->addRecord( ).../Logger.php:712
70.03951369120date_default_timezone_get ( ).../Logger.php:317

( ! ) Warning: Cannot modify header information - headers already sent by (output started at /var/www/html/vendor/monolog/monolog/src/Monolog/Logger.php:317) in /var/www/html/vendor/mrclay/minify/lib/Minify.php on line 477
Call Stack
#TimeMemoryFunctionLocation
10.0002238440{main}( ).../index.php:0
20.0058776808Minify\App->runServer( ).../index.php:8
30.01031198432Minify->serve( ).../App.php:286
40.05301451576Minify->errorExit( ).../Minify.php:243
50.05301452200header ( ).../Minify.php:477

( ! ) Warning: Cannot modify header information - headers already sent by (output started at /var/www/html/vendor/monolog/monolog/src/Monolog/Logger.php:317) in /var/www/html/vendor/mrclay/minify/lib/Minify.php on line 478
Call Stack
#TimeMemoryFunctionLocation
10.0002238440{main}( ).../index.php:0
20.0058776808Minify\App->runServer( ).../index.php:8
30.01031198432Minify->serve( ).../App.php:286
40.05301451576Minify->errorExit( ).../Minify.php:243
50.05301452200header ( ).../Minify.php:478

400 Bad Request

Please see https://github.com/mrclay/minify/blob/master/docs/Debugging.wiki.md.