We got a message from one of our customer to say they got this error message on our Magento 1.9.3 site when they tried to go to the checkout:
Missing class: Class 'bootstrap_mage' is missing
Any idea what could be causing this? I'm trying to get more detail from the customer but this is what I have for now. We have had about 25 successful orders since this customer reported the issue. Also I've checked to make sure both of these files exist on our production environment and they do:
Anyone have any ideas on what this could be?