How to fix "Slim Application Error" error while using lampp to host – Apache

I’m using lampp on my linux machine to host a website. The db is configured as the virtual host. Also, the php dependencies are fixed using composer. When I start the lampp components and I go to locahost I recive this error. I tried to fix it in some ways, but nothing worked.
Hope you can help me, thank you.

Slim Application Error

The application could not run because of the following error:

Details

Type: UnexpectedValueException
Message: The stream or file "../logs/app.log" could not be opened: failed to open stream: Permission denied
File: /opt/lampp/htdocs/starlight-app/vendor/monolog/monolog/src/Monolog/Handler/StreamHandler.php
Line: 107

Trace

#0 /opt/lampp/htdocs/starlight-app/vendor/monolog/monolog/src/Monolog/Handler/AbstractProcessingHandler.php(39): MonologHandlerStreamHandler->write(Array)
#1 /opt/lampp/htdocs/starlight-app/vendor/monolog/monolog/src/Monolog/Logger.php(344): MonologHandlerAbstractProcessingHandler->handle(Array)
#2 /opt/lampp/htdocs/starlight-app/vendor/monolog/monolog/src/Monolog/Logger.php(637): MonologLogger->addRecord(200, 'Loading route.', Array)
#3 /opt/lampp/htdocs/starlight-app/config/middlewares.php(94): MonologLogger->info('Loading route.', Array)
#4 [internal function]: Closure->{closure}(Object(SlimHttpRequest), Object(SlimHttpResponse), Object(Closure))
#5 /opt/lampp/htdocs/starlight-app/vendor/slim/slim/Slim/DeferredCallable.php(43): call_user_func_array(Object(Closure), Array)
#6 [internal function]: SlimDeferredCallable->__invoke(Object(SlimHttpRequest), Object(SlimHttpResponse), Object(Closure))
#7 /opt/lampp/htdocs/starlight-app/vendor/slim/slim/Slim/MiddlewareAwareTrait.php(70): call_user_func(Object(SlimDeferredCallable), Object(SlimHttpRequest), Object(SlimHttpResponse), Object(Closure))
#8 /opt/lampp/htdocs/starlight-app/vendor/slim/csrf/src/Guard.php(171): SlimApp->Slim{closure}(Object(SlimHttpRequest), Object(SlimHttpResponse))
#9 [internal function]: SlimCsrfGuard->__invoke(Object(SlimHttpRequest), Object(SlimHttpResponse), Object(Closure))
#10 /opt/lampp/htdocs/starlight-app/vendor/slim/slim/Slim/DeferredCallable.php(43): call_user_func_array(Object(SlimCsrfGuard), Array)
#11 [internal function]: SlimDeferredCallable->__invoke(Object(SlimHttpRequest), Object(SlimHttpResponse), Object(Closure))
#12 /opt/lampp/htdocs/starlight-app/vendor/slim/slim/Slim/MiddlewareAwareTrait.php(70): call_user_func(Object(SlimDeferredCallable), Object(SlimHttpRequest), Object(SlimHttpResponse), Object(Closure))
#13 /opt/lampp/htdocs/starlight-app/config/middlewares.php(178): SlimApp->Slim{closure}(Object(SlimHttpRequest), Object(SlimHttpResponse))
#14 [internal function]: Closure->{closure}(Object(SlimHttpRequest), Object(SlimHttpResponse), Object(Closure))
#15 /opt/lampp/htdocs/starlight-app/vendor/slim/slim/Slim/DeferredCallable.php(43): call_user_func_array(Object(Closure), Array)
#16 [internal function]: SlimDeferredCallable->__invoke(Object(SlimHttpRequest), Object(SlimHttpResponse), Object(Closure))
#17 /opt/lampp/htdocs/starlight-app/vendor/slim/slim/Slim/MiddlewareAwareTrait.php(70): call_user_func(Object(SlimDeferredCallable), Object(SlimHttpRequest), O Object(SlimHttpResponse), Object(Closure))
#18 /opt/lampp/htdocs/starlight-app/vendor/slim/slim/Slim/MiddlewareAwareTrait.php(117): SlimApp->Slim{closure}(Object(SlimHttpRequest), Object(SlimHttpResponse))
#19 /opt/lampp/htdocs/starlight-app/vendor/slim/slim/Slim/App.php(405): SlimApp->callMiddlewareStack(Object(SlimHttpRequest), Object(SlimHttpResponse))
#20 /opt/lampp/htdocs/starlight-app/vendor/slim/slim/Slim/App.php(313): SlimApp->process(Object(SlimHttpRequest), Object(SlimHttpResponse))
#21 /opt/lampp/htdocs/starlight-app/public/index.php(70): SlimApp->run()
#22 {main}