How to solve this error "Headers are read-only, response has already started"

[knox007]

I used some of the code on blazor in the csla 8.2.8 source code sample to create my own blazor server program. In this program I just add a page editperson, and when it runs it always says "Headers are read-only, response has already started".I find that errors always appear when I use vm.RefreshAsync.
I am a beginner, how can I solve this problem?
Thanks

[StefanOssendorf]

Please show the edit person create method. It looks like there is an await missing on the server side part.

[knox007]

Code

[StefanOssendorf]

Please post it here.

[knox007]

[knox007]

While debugging my program, I also debugged the program in the rock source code sample, and I did a comparison. I found in my vm. ApplicationContext. ContextManager. HttpContext.Items, No cslaSessionId this item, picture on the left is my program.

[rockfordlhotka]

This is almost certainly a configuration issue in Program.cs. Can you share the entire AddCsla call?

[knox007]

Thank you very much for your reply,I changed the version from csla8.2.8 to csla8.2.5, but something strange happened.,The problem didn't exist at the beginning, but after about a day, the problem repeatedly appeared, which was very embarrassing. I think it should be my configuration problem. The picture is the configuration of AddCsla in my Program.cs.