Hey Charmaine,
We build The Events Calendar and all of its add-ons with WordPress-standard code, not to specific themes, so in general, as long as the Avada theme follows WordPress coding and theme-operation standards, it should work fine.
In fact, we’ve found that many of our users use The Events Calendar and its add-ons with the Avada theme, without issue.
If you switch to the Avada theme and encounter more bugs with The Events Calendar, let us know and we’ll help try to resolve things immediately!
Thank you,
George