Cannot select project in digest configuration with Redmine Digest 1.1.0 on Redmine 3.3.3

[asmartin]

I'm running Redmine 3.3.3 with Redmine Digest 1.1.0 and Redmine Select2 1.1.0. When creating a digest rule, I'd like to select a specific project to exclude from the digest, so I select For any issue update except for the selected projects and then attempt to enter a project name in the search box. This fails and gives the following error in the console:

Uncaught TypeError: text.toUpperCase is not a function
    at matcher (redmine_digest.js:22)
    at DecoratedClass.SelectAdapter.matches (select2.js:3302)
    at DecoratedClass.InputData.query (select2.js:5948)
    at DecoratedClass.query (select2.js:580)
    at Select2.<anonymous> (select2.js:5330)
    at Select2.Observable.invoke (select2.js:637)
    at Select2.Observable.trigger (select2.js:627)
    at Select2.trigger (select2.js:5472)
    at Select2.open (select2.js:5492)
    at Select2.toggleDropdown (select2.js:5483)

How can I successfully use this feature to exclude a specific project from the digest? Thanks!