Car Demon Print Car and Pro Shortcodes not working after update to WP 5.5

I updated WordPress to 5.5-en almost a week ago. Afterwards, the home page of our website would not load. The theme we’re using is Zerif Pro. By disabling all plugins and re-enabling them one at a time, I was able to trace the problem to the Car Demon Print Car plugin. I have that plugin deactivated now, and the website appears to be working fine with one significant exception.

After reactivating all the other plugins that I had activated prior to this problem, I had to set up some things again, including parts of the main Car Demon plugin settings. And for some reason, I cannot get my inventory page to display properly. My search results page is “Inventory.” I’ve updated permalinks. And these are the shortcodes that I have on that page:

[pro_search style=”1″ title=”” hide_year_range=”on” hide_mileage=”on” hide_price=”on” hide_condition=”on” hide_location=”on” label_button=”Search”][pro_inventory title=”Preowned Vehicles” style=”8″]

I use these Car Demon plugins: Car Demon, Car Demon Custom Disclaimer, Car Demon Export Inventory, Car Demon Print Car, Car Demon Pro Search, and Car Demon Pro Shortcode.

Help, please.

The page I need help with: [log in to see the link]