UnexpectedValueException: External URLs do not have an internal route name.

With Drupal Core 9.3.6 i receive the following error when i submit the change password form:

The website encountered an unexpected error. Please try again later.

UnexpectedValueException: External URLs do not have an internal route name. in Drupal\Core\Url->getRouteName() (line 565 of core/lib/Drupal/Core/Url.php).
Drupal\prlp\Controller\PrlpController->prlpResetPassLogin(Object, '149', '1646144216', 'ImQ3Ae5UYmRJezHPn7TBROPNOhfjbeOce-PQhvRlQyc')
call_user_func_array(Array, Array) (Line: 123)
Drupal\Core\EventSubscriber\EarlyRenderingControllerWrapperSubscriber->Drupal\Core\EventSubscriber\{closure}() (Line: 564)
Drupal\Core\Render\Renderer->executeInRenderContext(Object, Object) (Line: 124)
Drupal\Core\EventSubscriber\EarlyRenderingControllerWrapperSubscriber->wrapControllerExecutionInRenderContext(Array, Array) (Line: 97)
Drupal\Core\EventSubscriber\EarlyRenderingControllerWrapperSubscriber->Drupal\Core\EventSubscriber\{closure}() (Line: 158)
Symfony\Component\HttpKernel\HttpKernel->handleRaw(Object, 1) (Line: 80)
Symfony\Component\HttpKernel\HttpKernel->handle(Object, 1, 1) (Line: 58)
Drupal\Core\StackMiddleware\Session->handle(Object, 1, 1) (Line: 48)
Drupal\Core\StackMiddleware\KernelPreHandle->handle(Object, 1, 1) (Line: 106)
Drupal\page_cache\StackMiddleware\PageCache->pass(Object, 1, 1) (Line: 85)
Drupal\page_cache\StackMiddleware\PageCache->handle(Object, 1, 1) (Line: 60)
Asm89\Stack\Cors->handle(Object, 1, 1) (Line: 265)
Drupal\shield\ShieldMiddleware->bypass(Object, 1, 1) (Line: 132)
Drupal\shield\ShieldMiddleware->handle(Object, 1, 1) (Line: 48)
Drupal\Core\StackMiddleware\ReverseProxyMiddleware->handle(Object, 1, 1) (Line: 51)
Drupal\Core\StackMiddleware\NegotiationMiddleware->handle(Object, 1, 1) (Line: 23)
Stack\StackedHttpKernel->handle(Object, 1, 1) (Line: 708)
Drupal\Core\DrupalKernel->handle(Object) (Line: 19)

Anyone can help?
Thanks!