What is the ruling on saying "no problem" when missing congregational prayer due to impurity?

The statement that abandoning congregational prayer is permissible is an error, for congregational prayer is obligatory according to the preponderant opinion, and intentionally missing it is a sin. Many scholars mandate performing it in the mosque. If you intended the second meaning, there is no harm. However, if you intended the first meaning while believing in its obligation, then you have erred, and your regret is hoped to erase the mistake. We advise you to verify before speaking, for perhaps a word spoken by its utterer may cast him into the Fire.