I didn't have time to wait, so I took matters into my own hands. Download and install the module from the attachment. This is version 1.1.0, then download the additional file and replace it in the folder containing your store: modules/productascombination/views/templates/front/combinations.tpl .
I eleminate 2 bugs:
1. Error code 500
When u add few products to show as combination and then some of this product will u delete u can get error.
2. Small improvements when u disable the product from active to unactive it still shows in product page as combination, after trying to open unactive product you get message that product is non available.
I update module with my files but if doesn't work do this replace it in the folder containing your store: modules/productascombination/views/templates/front/combinations.tpl
Now the module works correctly for all Ps v8.x versions
If you want, u can change css styles for your look