> Using "webpack" config function defined in next.config.js.
{ Error: commons.js from UglifyJs
SyntaxError: Unexpected token: name (Routes) [commons.js:66085,6]
    at /node_modules/next/dist/server/build/index.js:122:21
    at /node_modules/webpack/lib/Compiler.js:256:15
    at Compiler.emitRecords (/node_modules/webpack/lib/Compiler.js:348:37)
    at /node_modules/webpack/lib/Compiler.js:249:12
    at /node_modules/webpack/lib/Compiler.js:341:11
    at next (/node_modules/tapable/lib/Tapable.js:154:11)
    at Compiler.compiler.plugin (/node_modules/webpack/lib/performance/SizeLimitsPlugin.js:99:4)
    at Compiler.applyPluginsAsyncSeries1 (/node_modules/tapable/lib/Tapable.js:158:13)
    at Compiler.afterEmit (/node_modules/webpack/lib/Compiler.js:338:8)
    at Compiler.<anonymous> (/node_modules/webpack/lib/Compiler.js:333:14)
  errors: [ 'commons.js from UglifyJs\nSyntaxError: Unexpected token: name (Routes) [commons.js:66085,6]' ],
  warnings: [] }
error Command failed with exit code 1.