Error Message:
The website encountered an unexpected error. Please try again later.
Symfony\Component\Routing\Exception\RouteNotFoundException: Route "devel.execute_php" does not exist. in
Drupal\Core\Routing\RouteProvider->getRouteByName() (line
202 of
core\lib\Drupal\Core\Routing\RouteProvider.php).
Reason:
Most probably you are installing Devel module (
8.x-2.0) with Admin Toolbar installed
Fix:
https://www.drupal.org/project/admin_toolbar/issues/3009193
Upgrade to latest version of Admin Toolbar (
8.x-1.26)