Hi Luo
I have tried to copy the site (a couple of times) following the instructions on the page you linked to, but do not think I have been successful (I've provided the link, just in case I am mistaken).
Anyway, since that's just a dev environment and I am working on the site in a staging environment, feel free to do what you need to do on the website itself.
Here are the steps for setting up the widget.
First, on the homepage:
Click on the Beaver Builder link in the WP toolbar to open up the frontend editor
After page refreshes, scroll down the page to the ISSA International Events section
Click on CISO Executive Forum to open up the Beaver Builder WordPress widget module
You'll see that it's a Views widget, using the CISO Executive Forum View.
To create it yourself:
Hover over CISO Executive Forum
Click on the X in the options bar that will display on hover
Confirm that you want to delete it
Click on + in the righthand corner of the Beaver Builder toolbar that replaces the WordPress toolbar
Click on the dropdown (defaults to Standard Modules) in the panel that appears
Select WordPress Widgets
Drag and drop WP Views widget into the column that was left empty by deleting the widget
Click on the dropdown
Select CISO Executive Forum
Click Save
To save the current page:
Click on the Done button in the righthand corner of the Beaver Builder toolbar
Click on Publish
I added the sidebar View in the WordPress dashboard under Appearance > Widgets. I just selected WP Views for the Main Sidebar, then chose the CISO Executive Forum View.
Please note that both Views are functioning as they should at the moment - with Beaver Builder and Astra Pro active - because I have an additional post type selected (in this case Pages, but it seems that it can be anything) under Content Selection in the corresponding Views (links provided earlier).
Please also note that the Astra Pro plugin (from Brainstorm Force, developers of WP Astra theme, which the site uses and which Toolset is fully compatible with, according to Toolset docs) doesn't play a role in setting up/adding these widgets, just Beaver Builder's WordPress Widgets module and WordPress' native widget (in Appearance > Widgets) with either Beaver Builder and/or Astra Pro active.
And the problem can be "solved" by selecting (any) additional post type under Content Selection in the appropriate View, with Beaver Builder and/or Astra Pro active.
One final thing that may be worth noting: this problem does not happen with any other post type, only with Events Calendar posts.
Once again, thanks for all your help with this, Luo.