GMapFPpro: Can´t edit and add places

When I try to save edits of places or add new places, the error message: "DateTime::__construct() [<a href='datetime.--construct'>datetime.--construct</a>]: Failed to parse time string (-1-11-30 01:00:00) at position 5 (-): Double timezone specification " appears.
Joomla 3.4.4
GMapFPpro, Version J3_20pro