Uninstalling COS makes outbound routes crash before reload

Steps to reproduce:

1. Class of Service is installed. Uninstall COS but don't click the 'apply config' button
2. Navigating to outbound routes yields this whoops error:

Exception
Unable to locate the FreePBX BMO Class 'Cos'A required module might be disabled or uninstalled. Recommended steps (run from the CLI): 1) fwconsole ma install cos 2) fwconsole ma enable cos
/var/www/html/admin/libraries/BMO/Self_Helper.class.php
}

// Right, after all of this we should now have our object ready to create.
if (!class_exists($objname,false) && !class_exists($this->moduleNamespace.$objname,false) && !class_exists($this->freepbxNamespace.$objname,false)) {
// Bad things have happened.
if (!$loaded)

{ $sobjname = strtolower($objname); throw new \Exception(sprintf(_("Unable to locate the FreePBX BMO Class '%s'"),$objname) . sprintf(_("A required module might be disabled or uninstalled. Recommended steps (run from the CLI): 1) fwconsole ma install %s 2) fwconsole ma enable %s"),$sobjname,$sobjname)); //die_freepbx(sprintf(_("Unable to locate the FreePBX BMO Class '%s'"),$objname), sprintf(_("A required module might be disabled or uninstalled. Recommended steps (run from the CLI): 1) amportal a ma install %s 2) amportal a ma enable %s"),$sobjname,$sobjname)); }