ERROR `/undefined/undefined' not found in Jekyll logs

[cortinico]

Actual Behavior

The local Jenkins logs are reporting this error:

Configuration file: /Users/---/gdgpisa.github.io/_config.yml
Configuration file: /Users/---/gdgpisa.github.io/_config.yml
            Source: /Users/---/gdgpisa.github.io
       Destination: /Users/---/gdgpisa.github.io/_site
 Incremental build: disabled. Enable with --incremental
      Generating...
                    done in 0.789 seconds.
 Auto-regeneration: enabled for '/Users/---/gdgpisa.github.io'
Configuration file: /Users/---/gdgpisa.github.io/_config.yml
    Server address: http://127.0.0.1:4000/
  Server running... press ctrl-c to stop.
[2017-11-06 02:18:53] ERROR `/undefined/undefined' not found.

Steps to Reproduce the Problem

1. Copy the website locally
2. Start browsing

Specifications

• Browser: Chrome Version 62.0.3202.75 (Official Build) (64-bit)
• Tested locally on Jenkins 3.4.3