Addons not loading

Every time i click on the addons menu in garrys mod 13, i always get this

How do i fix this?

Isn’t this GMod 13?

Yes it is.

Report this at the GMod13 section because it isn’t “public” yet.

garry said subscribing to the Steam beta fixed this

[editline]24th August 2012[/editline]

for him