Your crock pot is way too small for your batch size. The SoapCalc shows a total of 2876.34 grams total weight including oils, water and lye. Convert that to pounds and you have 6.34 lbs.!
6.34 pounds equals 3 quarts plus 5.44 ounces volume That crock pot appears to be a round one so it's probably 4 quarts or so. However no crock pot I have ever used measured total volume correctly. They're usually undersized by about 10-12 ounces or so on the 4 quart models. My oblong 6 quart cooker actually measures 5-1/2 quarts with that being all the way to the top of the crockery. (Which no one ever goes that far due to boil over, etc.)
Remember that oils take up more volume by weight versus water, so you're probably at around 3-3/4 quarts by volume or so.
(Just a guesstimate on my part but probably close.)
You need to have a least twice the volume of a cooking container versus the batch size you're making.
You're making a 100% Coconut Oil soap. Just curious, but why are you doing that? The resulting soap will be extremely harsh on the skin. It will bubble like a beast but will strip the skin oils at the same time. The "Conditioning" range on SoapCalc is 44 to 69, your formula shows 10. You might want to reconsider your formula if you're planning on using this soap on a regular basis.
Just trying to give you some helpful tips. We're all here to help and encourage one another on this forum.
BTW - Welcome to the Forum!