Hi,
We are having exaclty the same issue, which is indeed caused by the presence of spaces in some additional fields.
For now we are fixing it by adding a params = params.replace( /\+/g, '%20' )
in the serialize function of tribe-events.js, however it would be much better to have a solution coming directly from Modern Tribe.
Any idea when this will be fixed?
Regards,
Ambroise