Youtube add new content is not working

[saavaas1]

Hello,

when i try add new youtube video, it is not working. In preview screen is error:

Unable to preview. undefined method `value' for nil:NilClass

Can Some one point me how to solve this problem ? Thanks in advance.

[pandel]

Add YouTube Data API key.

[Heberty]

I am receiving the same message, I have already entered the API KEY and it has not resolved.

EDIT: I was able to correct it after restarting the server.