Your account has recently been hacked.
Now Steam carries out massive blocking of scam accounts.
Technical work is also carried out on accounts that have been hacked.
To secure your account over the next few days, some work will be done regarding security.
Certain functions may not work stably, namely the trading platforms, trades and your inventories.
For the safety of your items trade them to a backup account or friend.
There have already been cases of loss of some items after technical work, their return took a very long time.

System Bot #8d63772b2dc1out92e032af