If you're using a variable across more than one route, but not globally across the whole application, it needs to go into a user cookie or saved per session. You currently have one global across the whole app. 
# Validate $c->param('router') 
$c->session->{$router} = $c->param('router');

# In other routes
my $router = $c->session->{$router} // $c->stash( router => $GLOBAL_DE
+FAULT_ROUTER );

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In reply to Re: Mojolicious global variable by trippledubs
in thread Mojolicious global variable by bartrad

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