Validating username and password.

[maherterminal1]

Hi,
I am following a tutorial on youtube on how to set up shibboleth idp and I
have been able set up shibboleth idp3.2.1, sp and ldap on ubuntu 16.04. so
the issue I get is when I put the username and password in the IdP login
page, it open a page with Web login error. so I hit back page. I get this
error message

ava.lang.IllegalStateException: You can only resume paused view states, and
state [ActionState at 2a2a137b id = 'ValidateUsernamePassword', flow =
'authn/Password', entryActionList = list[[empty]], exceptionHandlerSet =
list[[empty]], actionList = list[[AnnotatedAction at 11b2c4e targetAction =
[EvaluateAction at 2abd8c57 expression = ValidateUsernamePassword,
resultExpression = [null]], attributes = map[[empty]]],
[AnnotatedAction at 24ede84e targetAction = [EvaluateAction at 20d2780b
expression = 'proceed', resultExpression = [null]], attributes =
map[[empty]]]], transitions = list[[Transition at 65d0e275 on = proceed, to =
proceed], [Transition at 1f1b847f on =
opensamlProfileRequestContext.getSubcontext(T(net.shibboleth.idp.authn.context.AuthenticationContext)).isPassive()
|| !opensamlProfileRequestContext.isBrowserProfile(), to = ReselectFlow],
[Transition at 547fa04a on = AccountWarning, to = CallExpiringPassword],
[Transition at 675e98ee on = ExpiringPassword, to = CallExpiringPassword],
[Transition at 5ff1d3a on = ExpiredPassword, to = CallExpiredPassword],
[Transition at 46845986 on = AccountLocked, to = CallAccountLocked],
[Transition at 6f50dcec on = *, to = DisplayUsernamePasswordPage]],
exitActionList = list[[empty]]] is not a view state - programmer error




any hints on how to solve this issue?
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