Command git submodule update --init --force --recursive .travis failed: Submodule '.travis' (git://github.com/jsk-ros-pkg/jsk_travis) registered for path '.travis' Cloning into '/home/docs/checkouts/readthedocs.org/user_builds/jsk-visualization/checkouts/stable/.travis'... fatal: remote error: The unauthenticated git protocol on port 9418 is no longer supported. Please see https://github.blog/2021-09-01-improving-git-protocol-security-github/ for more information. fatal: clone of 'git://github.com/jsk-ros-pkg/jsk_travis' into submodule path '/home/docs/checkouts/readthedocs.org/user_builds/jsk-visualization/checkouts/stable/.travis' failed Failed to clone '.travis'. Retry scheduled Cloning into '/home/docs/checkouts/readthedocs.org/user_builds/jsk-visualization/checkouts/stable/.travis'... fatal: remote error: The unauthenticated git protocol on port 9418 is no longer supported. Please see https://github.blog/2021-09-01-improving-git-protocol-security-github/ for more information. fatal: clone of 'git://github.com/jsk-ros-pkg/jsk_travis' into submodule path '/home/docs/checkouts/readthedocs.org/user_builds/jsk-visualization/checkouts/stable/.travis' failed Failed to clone '.travis' a second time, aborting