Hi! I am getting "Error in t(y) %*% x : non-conformable arguments" when I use the summary function for my GMM model.

```
GMM <- pgmm(log_revenue ~ lag(log_revenue, 1:1) + CSat + Engage + Innov
|lag(log_revenue, 2:2) | lag(CSat, 1:1) + lag(Engage, 1:1) + lag(Innov,1:1),
data = p.data, effect = "twoways",model = "twosteps",
collapse = TRUE,transformation = "ld", fsm = "full",
subset = sample == 1, time.dummies = "TRUE")
summary(GMM)
```

How can I solve this issue?

I did use this code before and it was working back then. But I am experiencing this problem now.

Also, it works well using random/fixed effect estimations.

Thanks!