Have worked in professional and pastry kitchens.
Sorry, probably not safe.
If your morning time was latest 12 noon to 6 pm, that's 6 hours in the danger zone (5 to 60 C or 4 to 140 F), and if the morning temp before noon that makes longer.
See below for more info.
https://en.wikipedia.org...

As Rose Levy Beranbaum has said on her blog, "lemon curd was developed in Britain long before refrigeration was available". It has high sugar, high acid and the eggs are cooked. However, that would be my choice for me. I wouldn't serve it to guests. As nervy as I am (I have a cast iron stomach to prove it), I wouldn't serve it to others. Can someone stop at the store and grab a jar of it?

Thanks all! Luckily I have time to make a new batch, just sad to waste the ingredients - maybe we'll keep the room temp batch for family use only!

Personally, I'm inclined to think it fine but, as a general rule I would say (barring economic necessity) if you don't trust it, don't eat it- just not worth it.