I tried compiling all the modules and demo scripts from Vuldrick and they all get the same errors in the same scripts.
dmfi script
area enter scripts
and weather scripts.
for example:
6/10/2018 11:35:08 AM: Error. ‘vg_area_enter’ did not compile.
weather_inc_area.nss: ERROR: DUPLICATE FUNCTION IMPLEMENTATION (GetFirstArea)
I am sure these modules were working with the 1.69 version.
Restore the original weather_inc_area and then rename all occurences of GetFirstArea and GetNextArea in the module to e.g. GetFirstArea2 and GetNextArea2.