Fehler in multisynth_qp(X = bal_mat, trt = wide$trt, mask = wide$mask, : 'list' object cannot be coerced to type 'double'

[Maria-Anna]

Hello,

I have the following error:
Fehler in multisynth_qp(X = bal_mat, trt = wide$trt, mask = wide$mask, :
'list' object cannot be coerced to type 'double'

I am trying to run multisynth function
multisynth(form = log_gini ~ D,
unit = state_name,
time = wrkyr,
data= new_data)

My States all get treated at some point, so I have a staggered design and want to use not yet treated units as controls.

I would appreciate it if you could help me solve this issue.