EResult 20 when getting inventory after trade is completed

[PonyExpress]

Error: EYldRefreshAppIfNecessary failed with EResult 20

After the trade is completed, I get my Steam inventory using:

trade_offer_manager.getUserInventoryContents(my_sid, 753, 6, { tradableOnly: tradableOnly }, (error, inventory) => { //...

My inventory is large, ~150k items
Earlier (winter-spring), I had a delay of 1 second before getting my inventory and there were no errors.
Right now I have a 10 second delay and I still get this error sometimes.
If I use less than 8 seconds - the error is always.

Is there anything I can do or is this a bug on the steam servers and I can't do anything?
Thanks.

Edited August 18, 2022 by PonyExpress

[Dr. McKay]

https://steamerrors.com/20

It's a problem with Steam. Nothing we can do about it.