Problem with certificate on windows jabber clients

Hello. i have problem with windows based machines trying to connect to openfire using SSL. i successfully created self signed root ca cert, then certicate for openfire.
then imported this in openfire web ui. then, on clients i installed root ca to trust him. and on windows based machines i have warning
“the sertificate for srv-jabber could not be validated. The certificate is not trusted because no certificate that can verify it is currently trusted.” this warning on pidgin but on other clients the same warnings.
somehow on linux based machines i do not see this warning. i confirmed that on windows and linux based machines setting require encryption is active.
what am i doing wrong?

The message suggests that your clients on Windows do not see the root certificate that you’ve imported. Perhaps you didn’t import it in the right place?