Why I can't buy/make an offer a player?!

[Cat Harrison]

5* so late in the season can be hard to offload as only your level & above see him. It's easier to sell 4*. But the last week is hard to sell most players as less overall are buying.

[Sergio Mobrici]

5* so late in the season can be hard to offload as only your level & above see him. It's easier to sell 4*. But the last week is hard to sell most players as less overall are buying.

well, it's not my first season..i'm 14lvl, so i played many seasons and this never happened.. and i'm not tryng to sell'em from 2 days, but from 10..so, it's not the last week..this is why i asked if it's my problem or a bug.. thanks for the answer anyway