LaTeX errors are of different level of seriousness. Texifier classifies them into three different types, depending on their severity (see apps/workspace/sidebar/typeset-results/issues-list \ref{}, \citation{}, etc. carry an invalid argument, i.e., they refer to an entry that does not exist, Texifier shows this as a warning listed as a row carrying a yellow warning triangle
The Windows variant of this article will be updated in due course. To try out Texifier for Windows before it is publicly released, please sign up for a beta.