Plugin generated unexpected output during network activation

“The plugin generated 245 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.”

Tried deactivating and reactivating, but get the same message. Of note: I don’t remember getting this message when I first installed the plugin, but I recently had to disable my entire plugins folder and I’ve been re-enabling them one by one; yours was the 7th plugin enabled on the entire multisite and I got the above error. I’m thinking it may be caused by their already being settings in the database for the plugin to load into, perhaps?

https://ww.wp.xz.cn/plugins/google-analytics-dashboard-for-wp/