It seems that ALL your trainers have now been nullified by Steam.
What are you going to do about it?
Do you have evidence of such a thing such as official release notes or change log information about the patch? The last update that I see occurred happened on the 11th of this month and was for a UX fix in the client (which has nothing to do with its operations with games).
Nothing has changed on my PC.
All your trainers just stopped working.
ALL of CH trainers work fine with steam for me!!
the issue is on your end!!