Error: in PR reviewdog token error

[tsuyoshicho]

This problem sometimes happen. (not always)

see
https://travis-ci.org/vim-jp/vital.vim/jobs/554280167#L806-L809

# Run reviewdog.
reviewdog -reporter=github-pr-check
reviewdog: status=401: The access token not provided. Get token from https://reviewdog.app/gh/vim-jp/vital.vim
The command "if [[ "${RUN_LINT}" == "true" ]] ; then bash scripts/run-lint-on-ci.sh ; fi" exited with 1.

Is this well-known problem?