Liquid syntax error: Expected dotdot but found pipe in category-list.html

[ohadschn]

I enabled liquid: error_mode: strict in my _config.yml and encountered the following on build:

Liquid Exception: Liquid syntax error (line 14): Expected dotdot but found pipe in "{{(page_categories | split: ',' | sort:0) }}" in /var/lib/gems/2.3.0/gems/minimal-mistakes-jekyll-4.5.1/_includes/category-list.html, included in /_layouts/single.html

Environment information

• Minimal Mistakes version: 4.5.1
• Jekyll version: 3.5.2
• GitHub Pages hosted: no (hosted locally)
• Operating system: Bash on Ubuntu on Windows (WSL)