I'm trying to port my game to WebGL, I get an error Failed running */UnityLinker.exe --api=NET_2_0

I’m trying to port my game to WebGL, I get an error “Failed running E:\Program Files\Unity2017\Editor\Data\il2cpp/build/UnityLinker.exe --api=NET_2_0”

I used the latest Unity 2017.1 and the lastest Photon network free.

I changed Api Compatibility Level: .Net 2.0 Subset with Api Compatibility Level: .NET API 2.0
alt text

Please give me some suggestions, thank you!

alt text

Nobody knows. Unity support too. This issue has been relevant since Unity 2017.x.x and has not yet been resolved.
I have similar problem on 2019.3.11f1.
Bug Report # 1244061