JIRA Portfolio stuck on synchronizing weekly hour of team

[Anna Shwartzman]

On Configuring JIRA settings (https://confluence.atlassian.com/jiraportfolioserver/configuring-team-settings-802170547.html) I see:

To configure weekly hours of a team member:

1. In the Teams section, from the Weekly hours column, click the row of the team member whose hours you want to configure.
2. Enter the weekly hours for the member.
3.  Commit the changes back to your Jira instance.

If I'm doing change in weekly hours of one of team member and want to commit back to JIRA, my JIRA Portfolio is stuck and only restart helps.

My JIRA is working internally (no external links are approved).

Please help!