title: POST http://exaple.com/index.php?route=checkout/cart/add 500 (Internal Server Error)
body: <p>I am new to opencart. Some how I managed to create a website after reading online tutorial.</p>
  
  <p>The website was worked well, but since two day the add to cart button is not working. Its showing some error on console. I tried different browser but same result.</p>
  
  <p>Here I attached the screenshot.<a href="https://i.stack.imgur.com/5KVqj.jpg" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/5KVqj.jpg" alt="error 500"></a></p>
  
  <p>The website is posakaworld.com</p>
  
  <p>Any tips or hint is appreciated :)</p>