Figured out a fix for this issue I think.
Step1.
Log into your wordpress admin console.
Step2.
Click on the “Plugins List”.
Step3.
Click “Edit” for “Awesome Filterable Portfolio”.
Step4.
Click “awesome-filterable-portfolio/afp.php” to edit this file.
Step5.
With in this pages text input box scroll all the way down and find the line of code
<a class="colorbox" title="' . $item->item_description . '" href="' . $item->item_image . '"><img alt="" class="img-link-initial" src="' . $item->item_thumbnail . '"></a><br />
then update this line of code to be
<a class="colorbox cboxElement" title="' . $item->item_description . '" href="' . $item->item_image . '">
<img alt="" class="img-link-initial" src="' . $item->item_thumbnail . '">
</a><br />
Step6.
Press the Update File button at the bottom of the page.
FINISHED. This change looks to have fixed my issue so far. Here is my working example.
https://matthewjohnwilson.com/portfolio/
I am currently trying to update my galleries CSS now. Great plugin BriniA, hope this fix helps your next update.