Pixeldust Drupal Support Service

Drupal 8.9.20 Break after clear Cache

This is the message after clear cache.

The website encountered an unexpected error. Please try again later. SymfonyComponentDependencyInjectionExceptionRuntimeException: You have requested a non-existent parameter "app.root". in SymfonyComponentDependencyInjectionCompilerDefinitionErrorExceptionPass->processValue() (line 37 of /var/www/call/vendor/symfony/dependency-injection/Compiler/DefinitionErrorExceptionPass.php). SymfonyComponentDependencyInjectionCompilerDefinitionErrorExceptionPass->processValue() (Line: 60) SymfonyComponentDependencyInjectionCompilerAbstractRecursivePass->processValue() (Line: 30) SymfonyComponentDependencyInjectionCompilerDefinitionErrorExceptionPass->processValue() (Line: 39) SymfonyComponentDependencyInjectionCompilerAbstractRecursivePass->process() (Line: 140) SymfonyComponentDependencyInjectionCompilerCompiler->compile() (Line: 789) SymfonyComponentDependencyInjectionContainerBuilder->compile() (Line: 1335) DrupalCoreDrupalKernel->compileContainer() (Line: 916) DrupalCoreDrupalKernel->initializeContainer() (Line: 477) DrupalCoreDrupalKernel->boot() (Line: 707) DrupalCoreDrupalKernel->handle() (Line: 19)

Any ideas how to solve this problem?

Thanks

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