[COMPLETED] 1 Hr Planned downtime Tuesday (06/30) @10 AM Pacific (5 PM UTC)
 

From the announcements thread:

On Tuesday morning (June 30) at 10 AM Pacific time (5pm UTC), we plan to take Hero Lab Online, Realm Works, and our account/sales server down for maintenance. We expect up to about 1 hour of downtime, though it may be less.

EDIT: This has been completed.

Herolab is broken, only the left an menus and Right hand summary sheets are shoing. All of the data in th middle is blank. I have logged this but am really surprised that this has not been mentioned here.

HLO is working normally for me in the browser I normally use for it (Opera portable). It's working in Firefox as well when I check it, as well as nuEdge.
Which browser are you using?

Thank you for reporting this. This seems to be affecting non-US locales. We are rolling out a fix in approximately 5 minutes here. We expect the service to be back up within 5 minutes or less.

I'm in Texas and experiencing the same issue.

The service is back up. Please reload your browser page and give this another try if you were experiencing this issue.