ASP Boilerplate always shows the default error message

Question

I am using ASP Boilerplate (MVC + Jquery) to develop two different online applications. It works very good but there is a problem with ABP exception handler in both of them:

It always shows the default error message (An error has occurred! Error detail not sent by server) also in login validation.

How can I fix this problem?

I tried to debug this error and I realized that the error format that returned from server side is not a valid ABP error format.

Answer 1

please check in your web.config file that shoud be set to On

<customErrors mode="On" />