Hello!
I have a mediawiki problem. After I had an backup error, I erased all the files and removed the mysql database, and reinstalled mediawiki. But it does not run properly. When I access to /index.php, a error named "500 internal server error" occurs, without no error log. When I access to "localhost", there is one error message: "PHP Notice: Undefined index: error in \includes\http\GuzzleHttpRequest.php on line 194".
Does anyone know how to solve this problem?