Fix Open Handler (ajax requests)
Revert "Refactor `OpenHandlerController::handle()` (#1120)" (#1183) This reverts commit 49c1e07a86eaa6c908b787d05bd8cab57ff86bb6.
Revert "Refactor `OpenHandlerController::handle()` (#1120)" (#1183) This reverts commit 49c1e07a86eaa6c908b787d05bd8cab57ff86bb6.