I'm not sure how fixable this issue is, but I just found that lmerModLmerTest's call object has a character string of the formula instead of a formula object in the formula slot. This causes simr to fail when passed an lmerModLmerTest object instead of an lmerMod object, https://github.com/pitakakariki/simr/issues/230. I'm not a dev on simr, just a user who bumped into the issue, I'm raising it here in case it's an easy fix.
I'm not sure how fixable this issue is, but I just found that
lmerModLmerTest's call object has a character string of the formula instead of a formula object in the formula slot. This causessimrto fail when passed an lmerModLmerTest object instead of an lmerMod object, https://github.com/pitakakariki/simr/issues/230. I'm not a dev onsimr, just a user who bumped into the issue, I'm raising it here in case it's an easy fix.