Same issue. Esmi has it right! Thanks!
I noticed after I turned the plugins back on I couldn’t add any more tags to the original post or any other. So I turned off each plugin and back on checking in between for the ability to add tags, until I discovered that the WP Events Calendar was the problem. Deactivating only that plugin corrected the issue.
Tom
Hi,
I had the same problem. Tried turning off all plugins and Tags worked!
Not my idea, see http://ww.wp.xz.cn/support/topic/290882?replies=5
After turning the plugins back on, the tags still worked.
HTH,
Tom
