The password it wants is your Atlassian account password, and a Google-only account doesn't have one yet. Atlassian's own login doc says you need to set one first if you never signed up with email and password.
That's done with Can't log in? on id.atlassian.com/login. The catch is to enter the jumpkz.com address there, since that's the one the account is on, not the new nuvexkz.com one. Make sure that's the inbox you were watching.
If it doesn't show up at jumpkz.com either, I'd suspect that domain's mail filtering before anything else. Ask whoever runs that mailbox to look at quarantine for mail from Atlassian.
Once you have a password, redo the change at id.atlassian.com/manage-profile/email and enter it when the confirmation asks.
Still nothing after that? Then it's one for Atlassian support, they can see the account side.
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