It could be a proxy issue.
Try to update setupProxy.js
as your need.
const proxy = require('http-proxy-middleware')
module.exports = function(app) {
app.use(proxy ('/auth/google', { target: 'http://localhost:5000' }))
app.use(proxy ('/api/**', { target: 'http://localhost:5000' }))
}
Here is the similar problem reported here
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