I keep getting messages about trade offers in other leagues but it shows my trades tab as being yellow for that current league. I am also getting messages about notification container is missing.

I have this same problem.

one work around I have found to have not this problem is go thru the leagues you do have TRADES and either reject them or approve them then the problem about the trades tab as being yellow for the current league will go away.

Like if you are in LEAGUE 7 and 3 leagues have trades (2 , 20 , 47) just reject or approve of them then league 7 should work properly after you do that.