Hi guys,
I found a workaround for the articles addon. I'm going to try it on the articles vertical slider addon now.
I basically had to manually change the site.php file located in the addon folder in the right spot. I set the $image variable to pull from joomla's core intro image field.
(It seems like there is actually an issue displaying ANY images using the articles and articles slider addon. (It doesn't seem to be affecting the articles category display page menu's; just the module addons used by PB.) I'm using the latest version of PB on joomla 3.9 and php 7.4. I wonder if there is an issue with the image helper classes up the tree that the addons use to set the $image variables...)
Honestly, i think setting these to pull from the core joomla intro article images would be better; seeing as most people do not use the Blog tab in the article editor to choose images. It would be nice if the Joomshaper Helix Blog images parameters would pull the images to crop from the Joomla core intro or full image fields. A lot of sites that are currently using this method would work out of the box.
Anyways... here is the workaround i posted on the question i had in the forums. Hope it might help until they can fix what seems to be a bug.
https://www.joomshaper.com/forum/question/1696
Thanks :)