The product levels add-on is not working. It has been a while since I interacted with the plugin. I did uninstall and reinstall both the the inventory management plugin and the product levels add-on and continued to have the problem. I verified that simple products work after toggling the ATUM on\off switch for each product, but as soon as I start dealing with raw materials I start having issues. I created a variable raw material with one variation and a variable product that should contain the raw material.
A few examples of the problem:
1. I create a new PO with a raw material and getting "technical difficulties" error, sometimes with php errors.
2. While editing a variable product, when I add a raw material to the variation details, the raw material does not save.
3. Nothing shows up in Manufacturing Central
After working on the issue for a couple hours I selected the option under ATUM setting to delete data. I removed both plugins and then added them back. Currently everything seems to be working.