aliases.yaml looks like this:
# Cumin aliases, in the form: # key: query_using_the_global_grammar all: O{*} and not O{project:contintcloud} and not O{project:admin-monitoring}
For some reason, that 'and not' causes cumin to try to load the 'contintcloud' project. That project doesn't exist anymore, so Cumin gets a 403 from OpenStack and errors out.