Travis Julia Documentation error

#1

Does anyone has an idea what happens here:
https://travis-ci.org/lanl-ansi/Juniper.jl/jobs/503027633#L554

ERROR: failed to fetch from /home/travis/build/lanl-ansi/Juniper.jl, error: GitError(Code:ENOTFOUND, Class:Odb, object not found - no match for id (1b5ad74cd12ea626667c007337d94e4342b75378

I asked in the travis discourse forum as well without any answers: