Trying to run 'npm run build' got npm ERR! command failed npm ERR! command sh -c vue-cli-service build

Question

I am new to vue. While learning from tutorial (watch and code), I ran $ npm run build and I got this error. Using vue3

 ERROR  Error: CSS minification error: Parse error on line 1: 

^
Expecting "CALC", "LPAREN", "ADD", "SUB", "FUNCTION", "LENGTH", "ANGLE", "TIME", "FREQ", "RES", "UNKNOWN_DIMENSION", "EMS", "EXS", "CHS", "REMS", "VHS", "VWS", "VMINS", "VMAXS", "PERCENTAGE", "NUMBER", "expression", "math_expression", "function", "dimension", "number", got unexpected end of input. File: css/app.4b6f641c.css
Error: CSS minification error: Parse error on line 1: 

^
Expecting "CALC", "LPAREN", "ADD", "SUB", "FUNCTION", "LENGTH", "ANGLE", "TIME", "FREQ", "RES", "UNKNOWN_DIMENSION", "EMS", "EXS", "CHS", "REMS", "VHS", "VWS", "VMINS", "VMAXS", "PERCENTAGE", "NUMBER", "expression", "math_expression", "function", "dimension", "number", got unexpected end of input. File: css/app.4b6f641c.css
    at /home/benjamin/vue-crash-2022/node_modules/@intervolga/optimize-cssnano-plugin/index.js:106:21
    at async Promise.all (index 0)
npm ERR! code 1
npm ERR! path /home/benjamin/vue-crash-2022
npm ERR! command failed
npm ERR! command sh -c vue-cli-service build

npm ERR! A complete log of this run can be found in:
npm ERR!     /home/benjamin/.npm/_logs/2022-02-04T14_40_59_455Z-debug.log

I don't really have clue at all to this error and vue. I will appreciate clarity in answers or recommended documentations.

Answer 1

I caught the error. The errors were in my internal css. When I commented them it worked.

If anyone has similar problem, just work through your internal css to make sure they are in tight.