the variables F1 and G1 are not defined.
If you do not use a Ferraris sensor or a Gas sensor then you must remove the reference to these sensors.
(If you use them, the sensors are defined in userdefs.h: "FerrarisSensor F1(A3,A4,250,2222);")
if you do not use these sensors, delete the following lines from exosite.ino:
v = F1.Actual;
v = F1.Today;
v = G1.Actual;
v = G1.Today;