Could not find a valid build in the '.next' directory

[horibu]

Hi there,

I am trying to deploy my Next JS application on Ubuntu with PM2, but keep getting the following error:

Error: Could not find a valid build in the '/var/www/vhosts/example.com/httpdocs/.next' directory! Try building your app with 'next build' before starting the server.
at Server.readBuildId (/var/www/vhosts/example.com/httpdocs/node_modules/next/dist/next-server/server/next-server.js:659:23)
at new Server (/var/www/vhosts/example.com/httpdocs/node_modules/next/dist/next-server/server/next-server.js:52:29)
at createServer (/var/www/vhosts/example.com/httpdocs/node_modules/next/dist/server/next.js:2:133)
at Object. (/var/www/vhosts/horibuful.com/httpdocs/server.js:9:13)
at Module._compile (internal/modules/cjs/loader.js:1200:30)
at Object.Module._extensions..js (internal/modules/cjs/loader.js:1220:10)
at Module.load (internal/modules/cjs/loader.js:1049:32)
at Function.Module._load (internal/modules/cjs/loader.js:937:14)
at Object. (/usr/lib/node_modules/pm2/lib/ProcessContainerFork.js:32:23)
at Module._compile (internal/modules/cjs/loader.js:1200:30)

I can confirm that the .next folder is being created after I run "yarn build" !!

Would appreciate some feedback on this!