What have you tried? 

Sometimes when clicking you open the same page twice so the top page will not respond to any commands .Check and see in the whats opened tab if you have have two of the same thing open . Solution is to close one . Next ,when you go to some places page looks normal and should function but it wont because login is required . Why this is I dont know . Try a complete login . Username and password . last resort give more details and try your question again .     Bill

maybe you forget  username and password