Thank you for your workaround Roman. It helps a little, but the site still is not fully functional.
What I have discovered is this: If I restore a recent backup from when the site was fully functional, I can do the following without problems:
- Upgrade WordPress
- Upgrade all plugins but WooCommerce
When I upgrade WooCommerce however several problems arise. The frontpage gets stuck on the preloader and adding products to the shopping cart doesn’t work.
Disabling the WooCommerce doesn’t solve the problem either. It seems that the problem lies in the combination of the newest version of WooCommerce and TheShop theme, as switching to another theme (I have tried several) doesn’t produce this problem. I have also tried other hosting providers but the problem persists.
I hope this is of any help to find a solution. Also I cannot imagine that we are the only ones who experience this problem, a lot of websites will probably use the combination of TheShop and WooCommerce.
Thank you for any help you can provide!