lol i had the same problem but me screen just went black when i tried clan search,
so to fix it i just alt tabed and for some reason it was fine again.
You could try this to.
Tell me if this worked
If so plz thank me!
i got ur solution
if you have another acc join it. after,if it works there come back to ur acc and its done.
it used to happen to me alot..
if you dont have another acc. press leave clan after press clan search and do it repitely 5 times. if it doesn't work i dont know why,
if it works THANK ME!
fail it just made my screen black i cant alt tab cause i think i got a laptop or windows vista
negative..im on a laptop and im on vista also lol..but if thts the case i say u can either exit CA and then run the game as admin...usually solves issues for me and if that doesnt work..then keep tuning in on here and see what other ppl say lol