Since December the 4th, Google has stopped their free access to the "Googlemap" API resulting in PVsyst Interactive Map not working anymore. All PVsyst versions older than 6.7.7 are impacted.
You have two options to solve this problem:
1) Update PVsyst to version 6.7.7 or later. A new map (OpenStreetMap) and a new protocol (OpenLayers) is available from this new version:
2) Use an interactive map directly from your favorite Internet Browser and enter your coordinates in PVsyst manually: