Sims won't tattoo on tattoo table

I rearranged my tattoo shop after expanding and then my sim couldnt tattoo anyone . It was literally working before I expanded 😭i dont understand

Still having this issue🙄

I had the same issue after successfully operating the business for three days. Could not get sims to the tattoo table when the business was open, when previously it was fine, and it was fine if the business was not open. After checking the answers here, I discovered that the lot areas had changed, which is odd as I had not changed them, but many areas had changed from public to residential or from residential to public. The only adjustments I had made to the lot around when the problem started were putting up decorations from the attic box, and also I put up ceiling coverings -which I had forgotten when I set up the lot. I am quite sure I did not deliberately change the lot areas. So it seems that lot area designations can be changed accidentally somehow? I am hoping this is not a random occurring bug but accidentally happened when I changed the ceilings. It's easy enough to re-check the lot area designations after you make alterations on the lot, but we should see what kinds of alterations might be triggering them.

Like others have said- check your lot's area designations. they seem to sometimes get changed if you make any alterations on the lot.