BUG Edit-campaign button shows weird javascript error

[tractorcow]

According to stackoverflow, it could be due to two versions of react being installed, but I tend to feel that something else is at play here.

http://stackoverflow.com/questions/32048356/uncaught-typeerror-cannot-read-property-firstchild-of-undefined-in-react-rea

The issue seems to be triggered by GridField.js actions being clicked.

The page actually behaves as expected, but the error is annoying.

This is a screengrab of a similar issue from #5517

Please test the following scenario before closing this:

• Perform a hard-refresh on admin/pages
• Create new campaign
• Click back
• Click to edit the campaign you just created

[tractorcow]

This issue seems to have resolved itself. I can't replicate it anymore. closing.