I’m getting the error:
Running ‘texi2dvi’ on ‘dirichletprocess.tex’ failed.
LaTeX errors:
! Undefined control sequence.
l.1168 \ExplSyntaxOn
After a monthly scheduled build, having not pushed any changes to my package or .travis.yml. So I think something has changed in the TeX installation that is used.
Failing build: https://travis-ci.org/github/dm13450/dirichletprocess/jobs/700188538
Working build: https://travis-ci.org/github/dm13450/dirichletprocess/builds/700177807
Any help or pointers is greatly appreciated!