I am researching the effect of Chile's democratisation on income inequality with the synthetic control method

Income inequality is drawn from SWIID (2020) dataset which uses multiple imputation of variable 'gini_mkt'.
I tried to run this line of code:

Mi estimate, cmdok: synth gini_mkt population_growth gini_mkt(1987) gini_mkt(1980) gini_mkt(1976), trunit(44) trperiod(1988) xperiod(1976(1)1987) nested fig

I get back an error message

conformability error
an error occurred when mi estimate executed synth on m=1

Is the 'synth' command not compatible with 'mi estimate, cmdok:' ?
What can I do in order to run my command?