WP-nivo-slider Producing Error "Cannot modify header information - headers already sent by ..."

Question

I have installed the wp-nivo-slider and am now getting a list of these errors on my /wp-admin/ page.

The error is:

Warning: Cannot modify header information - headers already sent by (output started at /html/wp-content/plugins/wp-nivo-slider/wp-nivo-slider.php:633) in /html/wp-login.php on line 354

Any ideas?

Answer 1

This error is typically from there being extra spaces after the final closing ?> tag in a plugin file, or possibly even your wp-config.php file.