Cannot edit/update events

Hi all,

i’m having issue editing and updating events.

when i go to edit an event either;

A. the update button doesn’t work
or
B. the update button works BUT the event does not update (it reverts to the previous state)

Theme: Uncode (with it own version of WPbakery Builder)
plus: ticket manager and woocommerce

I have updated everything (theme and plugins).

any help would be greatly appreciated

thank you