WHAT DOES PEUGEOT ADBLUE REMOVAL MEAN?

Not surprisingly my head dropped. Then immediately after 20 miles of driving the lights turned off. I took it again to my neighborhood garage and no fault codes arrived up. (I drilled the opening in the cap by then).I bought a peoguot specialist van 2019. 26k on clock from personal purchaser. Took it for an extended check drive . Nothing at all. Dr