I can't Log in the orchestrator with "remember me"

Dear, everyone.

I just updated orchestrator 2017.2 to 2018.2

and then
I can not log in main page of the orchestrator with “checked remember me”

If I did not check “remember me”, I can log in my orchestrator.

If I checked “remember me”, Orchestrator unlimited work on main page.

In my guess, I should change some configurations in the “web.config”.

Please give me a hint of this situation.

best regards,