title: woocommerce shop single product image not shown
body: <p>I have tried the solution from a couple of posts, but none of them are working:</p>
  
  <p>here is the link to the woocommerce single product page
  <a href="https://happyukgo.com/product/aptamilfirstmilk/" rel="nofollow noreferrer">https://happyukgo.com/product/aptamilfirstmilk/</a></p>
  
  <p>It used to work until I upgrade woocommerce, theme, and wordpress (I don't know which one causes this).</p>
  
  <p>any hints will be appreciated. thanks</p>