$th->getMessage() string (22) "Undefined variable $ub"

⧉

Called from .../app/Controllers/Mobile/BC.php:105 [dd()]

.../codeigniter4/framework/system/CodeIgniter.php:861 [App\Controllers\Mobile\BC->initController()]
.../codeigniter4/framework/system/CodeIgniter.php:459 [CodeIgniter\CodeIgniter->createController()]
.../codeigniter4/framework/system/CodeIgniter.php:351 [CodeIgniter\CodeIgniter->handleRequest()]
<ROOT>/index.php:55 [CodeIgniter\CodeIgniter->run()]