1. Visit this page
  2. Download the zip file (direct download v1.0)
  3. Unzip it
  4. Upload the file it in wp-content/mu-plugins/

This file has two purposes:

  1. If you want to disable Loco Translate, but want to keep the custom loading functionality
  2. If you are suffering from the early loading problem

Source: https://gist.github.com/timwhitlock/a079bbf4f87eb4c44db87d270c7119c2