I finally found that wpForo conflicts with The Events Calendar

Can you tell us which events are you using?

I'm using event calendar of "Modern Tribe Inc."

Thank you

It's Modern Tribe's "The Events Calendar" looks like it's the same.

Thank you @jdiaz

@jdiaz,did you try the latest release of the event calendar - 4.4.0.1 09-01-2017?

Thank you