Error when a accepting offer - "substring not found"

[garhwar]

Hi, I am getting this error when trying to accept trade offers. It is originating from the method below in client.py
substring not found

@login_required def accept_trade_offer(self, trade_offer_id: str) -> dict:
....

I have got this error quite a few times and none of the trade offers are accepted automatically as of now. Is this a configuration issue from my end?
Can you please change the exception raised to include more context information?

[garhwar]

This is a duplicate of #376 which is still not resolved

[lspeed-v]

I investigated the issue. This error happens when you’ve made too many requests to Steam. How to check it?

1. Go to steam profile page
2. Log in in your account (if not logged)
3. try to open inventory page (on the same ip (proxy) where “substring error” happens.
4. If you see, error page “too many requests” so this error will happen.
   So why it happens? Because of:
   Fast re-checking your trade list
   Many requests trough SDA or any other software for auto-confirming.
   SIH may trigger this error.

How to solve this problem?
Turn off any software which communicates with your Steam profile for a while ( 24h may be), and try again.

Thats it.