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@Barb_Howard I'm nowhere near L4026, but from seeing its goal, I've had the same error on other candy order levels. If you get rid of a blocker before achieving the goal of the candy order, then the error will appear. It seems the order of this level is 2 color bombs and 15 chocolates. Did you get all 15 before the chocolates disappeared? Chocolates only regenerate as long as an existing chocolate is on the board. If you get rid of all too soon, then you'll be unable to collect all 15.
If that's not the trouble you're experiencing, check out the comments on this level @ https://candycrush.fandom.com/wiki/Level_4026 (scroll down to bottom). Someone else may have had the same issue and figured it out.