在lm错误。适合(x, y，偏移=偏移，单数。好吧=奇异。好的，……)0个非na的案例(moult包)

I'm new to R and don't understand much about how it works. I'm trying to run this code however the "Error in lm.fit(x, y, offset = offset, singular.ok = singular.ok, ...) : 0 (non-NA) cases" constantly appears and my data actually has no NA. So what should I do?I'm new to R and don't understand much about ho