localhost is currently unable to handle this request. http eror 500

I have Xampp on windows, i’m working with zend framwork 2. I have this error : localhost is currently unable to handle this request. http error 500

1-I reinstalled xampp.
2-I seted the variables display_errors: On and error_reporting : E_ALL in my php.ini config file and restarted the server.
3- i changed the access licel of htdocs.

My php \xampp\apache\logs\error.log:

[Tue Apr 20 15:40:34.148107 2021] [core:warn] [pid 3340:tid 480] AH00098: pid file C:/xampp/apache/logs/httpd.pid overwritten – Unclean shutdown of previous Apache run? [Tue Apr 20 15:40:34.201075 2021] [mpm_winnt:notice] [pid 3340:tid 480] AH00455: Apache/2.4.46 (Win64) OpenSSL/1.1.1g PHP/7.4.11 configured – resuming normal operations [Tue Apr 20 15:40:34.201075 2021] [mpm_winnt:notice] [pid 3340:tid 480] AH00456: Apache Lounge VC15 Server built: Aug 4 2020 11:50:23 [Tue Apr 20 15:40:34.201075 2021] [core:notice] [pid 3340:tid 480] AH00094: Command line: ‘c:\xampp\apache\bin\httpd.exe -d C:/xampp/apache’ [Tue Apr 20 15:40:34.204072 2021] [mpm_winnt:notice] [pid 3340:tid 480] AH00418: Parent: Created child process 5296 [Tue Apr 20 15:40:34.920846 2021] [mpm_winnt:notice] [pid 5296:tid 660] AH00354: Child: Starting 150 worker threads.

It still see the same error page localhost is currently unable to handle this request. http eror 500. Why?