Steam API disabled and Package Error "Cook failed"

Development Platform & Builds
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1

I did everyting about advanced steam but when ı try building its give me "Steam api " error.Also yesterday building working perfectly.But today when ı try to build its give me “oked data. UATHelper: Packaging (Windows (64-bit)): ERROR: Cook failed.” and “PackagingResults: Error: Unknown Cook Failure”. Idk what is problem.I upload uat_log and cook .txt files.Thx for help.,

UAT_Log = https://ufile.io/bhhr0
Cook text = https://ufile.io/gwu5e

When ı try standalone it’s working perfectly(steam multiplayer)

2

Well ? any question ? Do u someone have any question ?