E.B.
It will still be perfectly fine tomorrow, or the next day.
However, there are some important considerations about cooling it and storing it that you should probably be careful about. First, the crockpot sleeve is too substantial to allow for proper cooling. Crockpot sleeves are usually heavy ceramic, or insulated, or too large, and the meat will not cool quickly enough for safety. The best way to store cooked meat or casseroles or sauces is to remove them from the hot container that they were cooked in, and store them in plastic containers or storage bags or glass containers designed for refrigeration. And it's important to not store a huge quantity of food in one container. For example, if you have a couple of pounds of meat, don't lump it all in one giant container. Transfer it to a couple of smaller containers. This allows the cold refrigerated air to reach all the food.
When you reheat the meat, don't use the crockpot. It doesn't heat up quickly enough. Reheat in the microwave, or in the oven, or on the stove top.