{"record":{"id":"8cf2b1a7d0a80c7a","repo":"octobercms/october","slug":"ajax-handler-name-was-not-found","errorCode":null,"errorMessage":"AJAX handler ':name' was not found.","messagePattern":"AJAX handler ':name' was not found\\.","errorType":"exception","errorClass":"ApplicationException","httpStatus":null,"severity":"error","filePath":"modules/backend/classes/Controller.php","lineNumber":555,"sourceCode":"                 */\n                if ($event = $this->fireSystemEvent('backend.ajax.beforeRunHandler', [$handler])) {\n                    $response = ajax()::wrap($event);\n                }\n                else {\n                    $response = $this->callAjaxAction($this->action, $this->params);\n                }\n            }\n            catch (ComponentNotFound $ex) {\n                throw new SystemException(Lang::get('backend::lang.widget.not_bound', ['name'=>$this->getAjaxRequest()->component]));\n            }\n            catch (MassAssignmentException $ex) {\n                throw new SystemException(Lang::get('backend::lang.model.mass_assignment_failed', ['attribute' => $ex->getMessage()]));\n            }\n            catch (HandlerNameInvalid $ex) {\n                throw new ApplicationException(Lang::get('backend::lang.ajax_handler.invalid_name', ['name'=>$handler]));\n            }\n            catch (HandlerNotFound $ex) {\n                throw new ApplicationException(Lang::get('backend::lang.ajax_handler.not_found', ['name'=>e($handler)]));\n            }\n        }\n        catch (ValidationException $ex) {\n            Flash::error($ex->getMessage());\n            $response = ajax()->invalidFields($ex->errors());\n        }\n        catch (Throwable $ex) {\n            report($ex);\n            $response = ajax()->exception($ex);\n        }\n\n        if ($this->hasAssetsDefined()) {\n            foreach ($this->getAssetPathsWithAttributes() as $type => $paths) {\n                $response->asset($type, $paths);\n            }\n        }\n\n        $response = $this->outputVueComponentsForAjax($response);","sourceCodeStart":537,"sourceCodeEnd":573,"githubUrl":"https://github.com/octobercms/october/blob/b608633a7e8922487d91a8161499020121c3b3bf/modules/backend/classes/Controller.php#L537-L573","documentation":"Error \"AJAX handler ':name' was not found.\" thrown in octobercms/october.","triggerScenarios":"Thrown at modules/backend/classes/Controller.php:555 when the library encounters an invalid state.","commonSituations":"See trigger scenarios.","solutions":[],"exampleFix":null,"handlingStrategy":null,"validationCode":null,"typeGuard":null,"tryCatchPattern":null,"preventionTips":[],"tags":[],"backgroundTag":null,"analyzedSha":"b608633a7e8922487d91a8161499020121c3b3bf","analyzedAt":"2026-08-21T04:24:57.515Z","schemaVersion":2},"datasetVersion":"2026-08-21T11:28:35.574Z"}