Hello everyone!
First time poster, long time lurker here

I'm working on a project that requires obtaining the PRTEs for a few hypothetical policies. The main specification requires using interactive fixed effects (age and district), but whenever I try and do that, I get the following error:

invalid interaction specification;
multiple 'o' operators attached to a single variable are not allowed within an interaction specification
Here's an example of the code I'm running:

Code:
qui probit var2 instrument $controls i.age i.district i.age#i.district 
gen temp1=instrument
replace instrument=1 if instrument>1
predict double policy_1
replace instrument=temp1

mtefe var1 $controls  i.age i.district i.age#i.district  (var2 = instrument) , trimsupport(.05) prte(policy_1) pol(2) vce(robust)
Am I doing something wrong?

Thanks in advance for any input!