Then you do have income! Yeah, I agree it's the PPP that's the problem, because I can replicate your results.

If you omit the PPP income from the Line 16B Other tax-exempt income field, and override the Current Year Income from S-corp, that seems to get a tolerable presentation. I agree that this is not a particularly desirable course of action or presentation, but it seems to come out okay in the end - no diagnostics, at least.

Edited because I typo'd my Lacerte input: