[Plugin: OStatus for WordPress] Getting error msg after enable it

I’ve installed this plugin on wp 3.0,but error msg:
The plugin generated 1458 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

Also, support it on buddypress CMS which is most needed
https://www.buddypress.org

https://www.ads-software.com/extend/plugins/ostatus-for-wordpress/