Some themes and frameworks, such as the Oxygen Builder framework, do not work properly with how Instagram Feeds detects custom templates in a child theme. This can lead to our normal features related to custom templating to not work or cause errors.
To work around this, you can install and use a plugin that uses an alternative way of adding custom templates. You can download the plugin here:
Download Custom Template Plugin
After download and installing this plugin, you can make changes to the feed templates by doing the following:
1) Copy the latest version of the templates from Instagram Feed’s source files. These can be found in the /templates folder:
2) Add these templates to the /templates folder inside the sbi-custom-templates plugin (that you just downloaded and installed). You can delete any templates you do not want to be changed. 
3) Open the template files (i.e. feed.php, item.php) in a code editing program and make your edits.
You changes should then be reflected in your feeds when viewing them on the front-end of your site.
