Cannot edit button after plugin update

I am using Tesseract 2 theme by Tyler Moore on my website https://addywheatgrass.com/

It is my first attempt to make a website on WordPress platform.
I have no experience of coding.

MaxButton plugin was doing fine until i updated the Tesseract 2 Theme along with few other plugins including Beavear Page builder Free version and Max button.

Now i cannot Edit existing Buttons.

I cannot change button background while editing.
Neither can i change button real text.
Any editing in text do not show in button while editing. Click on save button do nothing.

Tried Deactivating Activating Maxbutton couple of time but it did not worked.
Even Deactivated and activated Beaver Page Builder it did not helped either.

Please advice what to do to correct the situation.

Thanks to Support Team.

https://www.ads-software.com/plugins/maxbuttons/