Plugin generated 257 characters of unexpected output during activation

[Dal]

Hello,

I just purchased this plugin and tried to install it but got the following error when I tried to activate it:

The plugin generated 257 characters of unexpected output during activation. If you notice “headers already sent” messages, problems with syndication feeds or other issues, try deactivating or removing this plugin.

Please advise.

 

[Victoria Kudryashova]

Hello,

I just purchased this plugin and tried to install it but got the following error when I tried to activate it:

The plugin generated 257 characters of unexpected output during activation. If you notice “headers already sent” messages, problems with syndication feeds or other issues, try deactivating or removing this plugin.

Please advise.

This is a notification , it will doesn't effect you plugin activation.