appjs687 Uncaught SyntaxError undefined is not valid JSON at JSONparse anonymous at eval userjs131 at srcstoremodulesuserjs appjs1401 at __webpack_require__ appjs68433 at fn appjs94021

This error occurs when the JavaScript JSON.parse() function is called with an invalid JSON string. In this case, the error is being thrown in the user.js module of the store.

To fix this issue, you need to ensure that the JSON string being passed to JSON.parse() is valid JSON. Check the code in user.js and make sure that the JSON string being parsed is correctly formatted.

If you provide the code in user.js, I can help you further in identifying the issue and providing a solution.