Unknown Cook Fail

Hey! I am having an issue that I dont understand. Can someone look at my log file and tell me what I have to do?
link text

ThirdPerson_AnimBP - The skeleton asset for this animation Blueprint is missing, so it cannot be compiled!

Yes, what MrMcKvarz said, this is from your log you shared:

[2019.06.06-20.02.11:286][211]UATHelper: Packaging (Windows (64-bit)):   LogBlueprint: Error: [Compiler ThirdPerson_AnimBP] ThirdPerson_AnimBP  - The skeleton asset for this animation Blueprint is missing, so it cannot be compiled! from Source: /Game/Mannequin/Animations/ThirdPerson_AnimBP.ThirdPerson_AnimBP
[2019.06.06-20.02.11:287][211]PackagingResults: Error: [Compiler ThirdPerson_AnimBP] ThirdPerson_AnimBP  - The skeleton asset for this animation Blueprint is missing, so it cannot be compiled! from Source: /Game/Mannequin/Animations/ThirdPerson_AnimBP.ThirdPerson_AnimBP
[2019.06.06-20.02.11:296][212]UATHelper: Packaging (Windows (64-bit)):   LogBlueprint: Warning: [Compiler ThirdPerson_AnimBP] [0116.80] Compile of ThirdPerson_AnimBP failed. 1 Fatal Issue(s) 0 Warning(s) [in 14 ms] (/Game/Mannequin/Animations/ThirdPerson_AnimBP.ThirdPerson_AnimBP)