I run a staggered DiD regression with the Stata command did_multiplegt_dyn by De Chaisemartin, C., & d’Haultfoeuille, X. (2024). Without control vars the command runs

# Comand without controls 
did_multiplegt_dyn outcome PLZ year treat_dummy, effects(8) placebo(6) cluster(PLZ)

as soon as I include control variables, even only one without any missings e.g., age I get the error: ” no observations”

# Comand with controls 
did_multiplegt_dyn outcome PLZ year treat_dummy, effects(8) placebo(6) cluster(PLZ) controls(age)

has anyone an idea what the problem is here?

I tried different control variables but the problem prevails