travis - build error

[xtcacti]

Worker information
0.15s0.01s0.01s0.00s0.01s
system_info
Build system information
0.01stravis_0.01s0.66s0.22s0.05s0.00s0.04s0.00s0.01s0.01s0.01s0.01s0.01s0.00s0.00s0.02s0.00s0.01s0.30s0.00s0.00s0.00s0.01s0.00s0.09s0.01s0.78s0.00s0.09s6.03s0.00s2.73s0.00s2.55s
docker_mtu_and_registry_mirrors
resolvconf
git.checkout
0.85s$ git clone --depth=50 --branch=main https://github.com/xtcacti/xtcacti.github.io.git xtcacti/xtcacti.github.io
0.01s
Setting environment variables from repository settings
$ export GH_TOKEN=[secure]
nvm.install
2.69s$ nvm install 10
cache.1
Setting up build cache
cache.npm
$ node --version
v10.23.2
$ npm --version
6.14.10
$ nvm --version
0.37.2
$ yarn --version
1.22.4
5.59s$ yarn --frozen-lockfile
yarn install v1.22.4
warning package-lock.json found. Your project contains lock files generated by tools other than Yarn. It is advised not to mix package managers in order to avoid resolution inconsistencies caused by unsynchronized lock files. To clear this warning, remove package-lock.json.
[1/4] Resolving packages...
warning hexo-deployer-git > hexo-util > highlight.js@9.18.5: Support has ended for 9.x series. Upgrade to @latest
error Your lockfile needs to be updated, but yarn was run with `--frozen-lockfile`.
info Visit https://yarnpkg.com/en/docs/cli/install for documentation about this command.
The command "eval yarn --frozen-lockfile " failed. Retrying, 2 of 3.
yarn install v1.22.4
warning package-lock.json found. Your project contains lock files generated by tools other than Yarn. It is advised not to mix package managers in order to avoid resolution inconsistencies caused by unsynchronized lock files. To clear this warning, remove package-lock.json.
[1/4] Resolving packages...
warning hexo-deployer-git > hexo-util > highlight.js@9.18.5: Support has ended for 9.x series. Upgrade to @latest
error Your lockfile needs to be updated, but yarn was run with `--frozen-lockfile`.
info Visit https://yarnpkg.com/en/docs/cli/install for documentation about this command.
The command "eval yarn --frozen-lockfile " failed. Retrying, 3 of 3.
yarn install v1.22.4
warning package-lock.json found. Your project contains lock files generated by tools other than Yarn. It is advised not to mix package managers in order to avoid resolution inconsistencies caused by unsynchronized lock files. To clear this warning, remove package-lock.json.
[1/4] Resolving packages...
warning hexo-deployer-git > hexo-util > highlight.js@9.18.5: Support has ended for 9.x series. Upgrade to @latest
error Your lockfile needs to be updated, but yarn was run with `--frozen-lockfile`.
info Visit https://yarnpkg.com/en/docs/cli/install for documentation about this command.
The command "eval yarn --frozen-lockfile " failed 3 times.
The command "yarn --frozen-lockfile" failed and exited with 1 during .
Your build has been stopped.

[xtcacti]

add below to .travis.yml file with specific format:

install:
  - yarn

ref:

• https://github.com/zoeyg/binance/issues/78
• https://blog.esunr.xyz/2020/03/TravisCi%E4%BD%BF%E7%94%A8yarn%E5%AE%89%E8%A3%85%E6%9E%84%E5%BB%BA%E5%A4%B1%E8%B4%A5%E5%8E%9F%E5%9B%A0/#2-%E5%88%86%E6%9E%90