found it,
this is due to special characters in file
ZsensorBH1750.ino
Just remove this file if you don’t need it or remove the lines 85-98 from the file
/*
Useful Information ;-)
lux (lx) # 1 lx = 1 lm/m^2 = 1 cd·sr·m⁻^2.
meter-candle (m-cd) # 1 m·cd = 1 lx = 1 lm/m^2 = 1 cd·sr·m⁻^2.
centimeter-candle (cm-sd) # 1 m·cd = 1 lx = 1 lm/m^2 = 1 cd·sr·m⁻^2.
foot-candle (ft-c) #
phot (ph) # 1 ph = 1 lm/cm^2 = 10,000 lm/m^2 - 10,000 lx = 10 klx
nox (nx) # 1 nox = 1 millilux
candela steradin/meter2(cd·sr·m⁻^2) # 1 lx = 1 lm/m^2 = 1 cd·sr·m⁻^2
lumen/meter2 (lm·m⁻^2) # 1 lx = 1 lm/m^2 = 1 cd·sr·m⁻^2
lumen/centimeter2 (lm·cm⁻^2) # 1 lm/cm^2 = 10,000 lx = 10,000 cd·sr·m⁻^2
lumen/foot2 (lm·ft⁻^2) # (lm·ft⁻^2)
watt/centimeter2 at 555nm (W·cm⁻^2) #
*/