Notice (8): compact(): Undefined variable: etagMatches [CORE/src/Http/Response.php, line 1875]
Warning (512): Unable to emit headers. Headers sent in file=/home/concent/project/jk-shop/vendor/cakephp/cakephp/src/Error/Debugger.php line=850 [CORE/src/Http/ResponseEmitter.php, line 48]
Warning (2): Cannot modify header information - headers already sent by (output started at /home/concent/project/jk-shop/vendor/cakephp/cakephp/src/Error/Debugger.php:850) [CORE/src/Http/ResponseEmitter.php, line 148]