getting error while signup

[anupdineout]

{ Error: Cannot enqueue Query after fatal error.
at Protocol._validateEnqueue (/Users/anup.kumar1/Documents/React-Instagram-Clone-2.0/node_modules/mysql/lib/protocol/Protocol.js:201:16)
at Protocol._enqueue (/Users/anup.kumar1/Documents/React-Instagram-Clone-2.0/node_modules/mysql/lib/protocol/Protocol.js:139:13)
at Connection.query (/Users/anup.kumar1/Documents/React-Instagram-Clone-2.0/node_modules/mysql/lib/Connection.js:208:25)
at Promise (/Users/anup.kumar1/Documents/React-Instagram-Clone-2.0/config/db.js:18:8)
at new Promise ()
at Object.query (/Users/anup.kumar1/Documents/React-Instagram-Clone-2.0/config/db.js:17:10)
at app.post (/Users/anup.kumar1/Documents/React-Instagram-Clone-2.0/routes/user/login-routes.js:42:21)
at
at process._tickCallback (internal/process/next_tick.js:182:7) code: 'PROTOCOL_ENQUEUE_AFTER_FATAL_ERROR', fatal: false }

[Faiyaz Shaikh]

Have you followed all the steps