retract problem

im not the first one in this forum to have this problem but i guess it happens.

i had a trade back in 2015 that never got swapped, now when i try to retract it it gives this message "[ at "SYS.UTL_HTTP", line 1525 at "MARIO.POST_MNGR", line 233 at "SYS.UTL_HTTP", line 1130 at "MARIO.GAME_STEAM_BOT_MNGR", line 1301 at "MARIO.GAME_STEAM_BOT_MNGR", line 3702 ]"

i dont care about the swap right now because i bought the item, i wanna have my items back please