My store does not work correctly. For example, the following error appears when click "Checkout":
Failed to load resource: the server responded with a status 500 (Internal Server Error)
Or button "Generate" does not work in store of PBAS 4.5:
Everything works normally in the other resellers/provider's store.
Store/template is customized.
Each customization is to be checked separately, there is no general solution.
Refer to this KB for more detail: How do I configure a custom plug-in with PBA-S?