быть дело?
первый же запрос в гугле по тексту ошибки https://stackoverflow.com/questions/66028314/error-node-modules-callback-was-already-called
I found the issue. The folder containing my vue project didn’t have the correct case. It was called ‘clientapp’ instead of ‘ClientApp’. It seems that the production build is case sensitive while the dev build is not… strange. I would recommend you @ejc7f to check the naming of your folders and see if there is no issue with the case of your files and folders.
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