Website Images Not Displaying After Updating wordpress

Every image is coming up as https://stanproperty.com/wp-content/themes/stanproperty/images/placeholder.png so it’s not that the images are gone necessarily, but for some reason your theme only wants to show the placeholder everywhere.

Are there any plugins involved in generating those listing, if so which? Or, is that how the theme operates, and if so, what is the name of the original theme and where did you get it?

Yes there are plugins involved.
I have deactivated and reactivated all plugins still did not work.
The name of the theme is openhouse real estate and automotiv car dealership. here is the url
https://themeforest.net/item/openhouse-real-estate-automotiv-car-dealership/104662
and it seems the theme has been discontinued by author.

Looks like there’s a new version https://themeforest.net/item/openhouse-real-estate-and-openroad-car-dealer-responsive-material-wordpress-theme/14346051 last updated August 10, and a support forum: https://groups.google.com/forum/#!forum/openhouse-and-openroad

Since that is a commercial theme, we have to ask that you please go to their official support channel, so you can get support from the people who know it best. Forum volunteers are also not given access to commercial products, so they would not know why it is not working properly. Other community members who may have faced your issue might be able to help you but your best bet is your product’s developer. Keep in mind we encourage you to use the official support venues, as it allows the developers to be aware of issues with their code and gives back to the community in a more robust way.