Urlbutton not working

hi all, very new in pyrevit here, i literally created my tool bar just 2 days ago and compiling together the things that i need on my tab.

whenever i use the .urlbutton it doesn’t work and just instead only shows this:

tried to literally copy the existing working yaml file from pyrevit extension and paste it here but no luck. i suspect i would need to update something but not sure what.

my yaml file:

tried restarting revit and machine but no luck. thanks in advance!

update: nevermind. i added new panels and it somehow sorted itself. link is working now.