HTTP ERROR 403 No valid crumb was included in the request

[rnlduaeo]

Does anyone encounter this error while trying to login with the username and password?
I tried many stuffs in stackoverflow below,
https://stackoverflow.com/questions/44711696/jenkins-403-no-valid-crumb-was-included-in-the-request

but nothing works?
Can anyone help me to login to the jenkins?

[apogorielov]

Hi! Unfortunately I need a bit more information to be able to assist you with this problem.
I would kindly ask to test out latest update with up-to-date plugins and get back to me with Jenkins logs if this issue is still happening.
Kind regards,
Alex

[Viktorpav]

I have an issue with download new plugins from Jenkins UI

Unable to connect to the URL.
java.net.ConnectException: HTTP connect timed out