Why is my Facebook pixel not tracking purchases after modifying checkout page?

[swastikumar]

Hi guys, one day suddenly my facebook pixel stopped tracking my purchases, and i was not sure why that had happened. So i turned some of my apps off, one of which was the vitals 'Accerated checkout' app, it disable the cart page for a faster checkout, but i was not able to correct the tracking. i kept looking for a long time to find a fix for this. then today while trying to install the google tag manager i realised that my order confirmation page doesnt have the '\thank_you' path (see comparison, mine is the one on top and the normal checkout the one below). I think this is definitely not normal and that there is something seriosuly wrong my checkout page. can you guys help me figure out how i can reset this so that the thank you url can restart my conversion tracking? 

I would be indebted for any kind of support/assistance. 

[swastikumar]

Also the abandoned checkout page to see abandoned orders is also no more.