I don’t think that’s the normal use of “conceptual problem.”
If physicists believe, as their verbiage seems to indicate, that QED is a real theory that is an approximation to reality, and they compute approximations to the numbers in QED, while QED is actually inconsistent, I would say that is an error and a paradigmatic example of a conceptual error.
What does it mean to interpret an inconsistent theory?
I don’t think that’s the normal use of “conceptual problem.”
If physicists believe, as their verbiage seems to indicate, that QED is a real theory that is an approximation to reality, and they compute approximations to the numbers in QED, while QED is actually inconsistent, I would say that is an error and a paradigmatic example of a conceptual error.
What does it mean to interpret an inconsistent theory?