i need help to solve this error in Laravel project

i need help to solve this error in Laravel project 

when run project using commmand this error show me

 > @php artisan package:discover

PHP Fatal error:  During inheritance of ArrayAccess: Uncaught ErrorException: Return type of IlluminateSupportCollection::offsetExists($key) should either be compatible with ArrayAccess::offsetExists(mixed $offset): bool, or the #[ReturnTypeWillChange] attribute should be used to temporarily suppress the notice in C:xampphtdocsbustracking_multivendorlaravelframeworksrcIlluminateSupportCollection.php:1693

Stack trace:

#0 C:xampphtdocsbustracking_multivendorlaravelframeworksrcIlluminateSupportCollection.php(19): IlluminateFoundationBootstrapHandleExceptions->handleError(8192, ‘Return type of …’, ‘C:\xampp\htdocs…’, 1693)

#1 C:xampphtdocsbustracking_multivendorcomposerClassLoader.php(571): include(‘C:\xampp\htdocs…’)

#2 C:xampphtdocsbustracking_multivendorcomposerClassLoader.php(428): ComposerAutoloadincludeFile(‘C:\xampp\htdocs…’)

#3 C:xampphtdocsbustracking_multivendorlaravelframeworksrcIlluminateSupporthelpers.php(423): ComposerAutoloadClassLoader->loadClass(‘Illuminate\Supp…’)

#4 C:xampphtdocsbustracking_multivendorlaravelframeworksrcIlluminateFoundationPackageManifest.php(121): collect(Array)

#5 C:xampphtdocsbustracking_multivendorlaravelframeworksrcIlluminateFoundationPackageManifest.php(97): IlluminateFoundationPackageManifest->build()

#6 C:xampphtdocsbustracking_multivendorlaravelframeworksrcIlluminateFoundationPackageManifest.php(80): IlluminateFoundationPackageManifest->getManifest()

#7 C:xampphtdocsbustracking_multivendorlaravelframeworksrcIlluminateFoundationBootstrapRegisterFacades.php(26): IlluminateFoundationPackageManifest->aliases()

#8 C:xampphtdocsbustracking_multivendorlaravelframeworksrcIlluminateFoundationApplication.php(213): IlluminateFoundationBootstrapRegisterFacades->bootstrap(Object(IlluminateFoundationApplication))

#9 C:xampphtdocsbustracking_multivendorlaravelframeworksrcIlluminateFoundationConsoleKernel.php(296): IlluminateFoundationApplication->bootstrapWith(Array)

#10 C:xampphtdocsbustracking_multivendorlaravelframeworksrcIlluminateFoundationConsoleKernel.php(119): IlluminateFoundationConsoleKernel->bootstrap()

#11 C:xampphtdocsbustracking_multiartisan(35): IlluminateFoundationConsoleKernel->handle(Object(SymfonyComponentConsoleInputArgvInput), Object(SymfonyComponentConsoleOutputConsoleOutput))

#12 {main} in C:xampphtdocsbustracking_multivendorlaravelframeworksrcIlluminateSupportCollection.php on line 19

PHP Fatal error:  Uncaught ErrorException: Method ReflectionParameter::getClass() is deprecated in C:xampphtdocsbustracking_multivendorlaravelframeworksrcIlluminateContainerContainer.php:811

Stack trace:

#0 C:xampphtdocsbustracking_multivendorlaravelframeworksrcIlluminateContainerContainer.php(811): IlluminateFoundationBootstrapHandleExceptions->handleError(8192, ‘Method Reflecti…’, ‘C:\xampp\htdocs…’, 811)

#1 C:xampphtdocsbustracking_multivendorlaravelframeworksrcIlluminateContainerContainer.php(780): IlluminateContainerContainer->resolveDependencies(Array)

#2 C:xampphtdocsbustracking_multivendorlaravelframeworksrcIlluminateContainerContainer.php(631): IlluminateContainerContainer->build(‘App\Exceptions\…’)

#3 C:xampphtdocsbustracking_multivendorlaravelframeworksrcIlluminateContainerContainer.php(586): IlluminateContainerContainer->resolve(‘App\Exceptions\…’, Array)

#4 C:xampphtdocsbustracking_multivendorlaravelframeworksrcIlluminateFoundationApplication.php(732): IlluminateContainerContainer->make(‘App\Exceptions\…’, Array)

#5 C:xampphtdocsbustracking_multivendorlaravelframeworksrcIlluminateContainerContainer.php(256): IlluminateFoundationApplication->make(‘App\Exceptions\…’, Array)

#6 C:xampphtdocsbustracking_multivendorlaravelframeworksrcIlluminateContainerContainer.php(749): IlluminateContainerContainer->IlluminateContainer{closure}(Object(IlluminateFoundationApplication), Array)

#7 C:xampphtdocsbustracking_multivendorlaravelframeworksrcIlluminateContainerContainer.php(631): IlluminateContainerContainer->build(Object(Closure))

#8 C:xampphtdocsbustracking_multivendorlaravelframeworksrcIlluminateContainerContainer.php(586): IlluminateContainerContainer->resolve(‘Illuminate\Cont…’, Array)

#9 C:xampphtdocsbustracking_multivendorlaravelframeworksrcIlluminateFoundationApplication.php(732): IlluminateContainerContainer->make(‘Illuminate\Cont…’, Array)

#10 C:xampphtdocsbustracking_multivendorlaravelframeworksrcIlluminateFoundationBootstrapHandleExceptions.php(159): IlluminateFoundationApplication->make(‘Illuminate\Cont…’)

#11 C:xampphtdocsbustracking_multivendorlaravelframeworksrcIlluminateFoundationBootstrapHandleExceptions.php(101): IlluminateFoundationBootstrapHandleExceptions->getExceptionHandler()

#12 C:xampphtdocsbustracking_multivendorlaravelframeworksrcIlluminateFoundationBootstrapHandleExceptions.php(87): IlluminateFoundationBootstrapHandleExceptions->renderForConsole(Object(ErrorException))

#13 C:xampphtdocsbustracking_multivendorlaravelframeworksrcIlluminateFoundationBootstrapHandleExceptions.php(123): IlluminateFoundationBootstrapHandleExceptions->handleException(Object(ErrorException))

#14 [internal function]: IlluminateFoundationBootstrapHandleExceptions->handleShutdown()

#15 {main}

  thrown in C:xampphtdocsbustracking_multivendorlaravelframeworksrcIlluminateContainerContainer.php on line 811

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