If your pop-up blocker is turned on (Chrome also turns it on by default) and the site you are on tries to send a pop-up, an icon that looks like a browser bar with a red 'x' will appear in your address bar (red arrow).
Clicking on the icon will allow you to.
Then Refresh Project.
If you want to permanently disable pop-up blocking in Chrome:
Select "Settings" from the Chrome menu.
Select the "Show advanced settings..." link at the bottom of that page
Select "Content settings..." from the Privacy section
Select "Allow all sites..." radio button from Pop-ups section and " Done "
Mozilla Firefox
If your pop-up blocker is turned on (Mozilla also turns it on by default) and the site you are on tries to send a pop-up, an icon that looks like a browser bar with a red 'x' will appear in your address bar (red arrow).
Clicking on the icon will allow you to.
If you want to permanently disable pop-up blocking in Mozilla Firefox:
Select "Options" from the menu bar.
Select the "Content" link at the bottom of that page