When I go to Stores->Stocks there is an error message:
The website with code base that was requested wasn't found. Verify the website and try again.
I verified that the table inventory_stock is located in the database and contain the Default Stock which no longer shows up in the admin.
This causes a problem where all products are out of stock. When I try to Add New Stock under Manage Stock Magento says it was added, but no new stock appears.