Testcafe fails on Jenkins built

I've made everything from https://devexpress.github.io/testcafe/documentation/guides/continuous-integration/jenkins.html. But builds fails always:

• node --version v14.2.0
• npm --version 6.14.4
• grunt --version grunt-cli v1.2.0
• bower --version 1.8.8
• npm install testcafe testcafe-reporter-xunit npm WARN deprecated core-js@2.6.11: core-js@<3 is no longer maintained and not recommended for usage due to the number of issues. Please, upgrade your dependencies to the actual version of core-js@3. npm WARN deprecated urix@0.1.0: Please see https://github.com/lydell/urix#deprecated npm WARN deprecated resolve-url@0.2.1: https://github.com/lydell/resolve-url#deprecated npm WARN deprecated core-js@1.2.7: core-js@<3 is no longer maintained and not recommended for usage due to the number of issues. Please, upgrade your dependencies to the actual version of core-js@3.

core-js@2.6.11 postinstall /var/lib/jenkins/jobs/testcafe/workspace/node_modules/core-js node -e "try{require('./postinstall')}catch(e){}"

npm WARN saveError ENOENT: no such file or directory, open '/var/lib/jenkins/jobs/testcafe/workspace/package.json' npm notice created a lockfile as package-lock.json. You should commit this file. npm WARN enoent ENOENT: no such file or directory, open '/var/lib/jenkins/jobs/testcafe/workspace/package.json'

• node_modules/.bin/testcafe chrome tests/smokeTest.js -r xunit:res.xml -s takeOnFails=true /tmp/jenkins4618268829523592648.sh: 20: /tmp/jenkins4618268829523592648.sh: node_modules/.bin/testcafe: not found Build step 'Execute shell' marked build as failure Recording test results An attempt to send an e-mail to empty list of recipients, ignored. Finished: FAILURE

What am I doing wrong?