Error
{#
I'd like to use ``build.error|urlize`` here, so we can have nice links.
However, this is not possible because we are using `data-bind="text: error"`
which means that Knockout.js will use the `.error` attribute to fill
the content of this tag dynamically.
#}
One or more submodule URLs are not valid: ['externals/HighFive', 'externals/json', 'externals/argparse', 'externals/sqlite_orm', 'externals/include/pbar', 'externals/include/cppitertools'], git/ssh URL schemas for submodules are not supported.