我的circle-ci部署失败并出现以下错误，这似乎是一个heroku内部服务器错误。 我该如何解决这个问题？
set git remote heroku to https://git.heroku.com/repo-name.git
▸ heroku-cli: update available from 6.12.9 to 6.13.19-6cd27b3
Installing plugin heroku-container-registry... !
▸ yarn --non-interactive --mutex=file:/home/ubuntu/.cache/heroku/yarn
▸ --cache-folder=/home/ubuntu/.cache/heroku/yarn exited with code 1
▸ error An unexpected error occurred:
▸ "http://cli-npm.heroku.com/mimic-fn/-/mimic-fn-1.1.0/e667783d92e89dbd342818b5230b9d62a672ad18/e667783d92e89dbd342818b5230b9d62a672ad18.tgz:
▸ Request failed \"500 Internal Server Error\"".
▸
▸ heroku-cli: update available from 6.12.9 to 6.13.19-6cd27b3
▸ container:push is not a heroku command.
▸ Perhaps you meant commands
▸ Run heroku help for a list of available commands.