Problem:
When I try usual procedure - click "+" after which normally WPML site opens up, in case of the events, the fatal error comes up:
Fatal error: Uncaught InvalidArgumentException: Argument ID must be numeric and greater than 0
Solution:
We've updated The Events Calendar plugin, and then we realized that the problem was only occurring with old events, the new events didn’t present any issues to be translated. So in order to solve the issue, we created translation records on the database for the events that have been already built.
