@timepassenger @testcard @calisun It is issue of memory limit, Which is common on elementor these days, When you are having multiple addons installed. When you have more widgets in your elementor panel, It required more memory limit to make all work properly. It is not just related to The Plus Addons, This is issue of all addons. You may try to disable other addons and just keep The Plus Addons, You will see things work well. Then, Enable others one by one and you will find, Last activated plugin might create this same issue.
Solutions:
1. You need to change server configuration for memory limit to 512M or 768M, Which will resolve this issue. You can reach to your hosting provider, They will update that value quickly for you. You also can use a wp-config file method as well. https://www.wpbeginner.com/wp-tutorials/fix-wordpress-memory-exhausted-error-increase-php-memory/
2. If you can not increase your memory limit somehow, You can turn off all unused widgets from The Plus Addons, as well as other addons you are using on your website.
https://elementor.theplusaddons.com/elementor-news/ultimate-troubleshooting-of-common-issues-of-elementor-page-builder/