Can't Edit Text Block

I think this is due to accidental un-closed HTML tags and/or attributes without closing quotes. What I did to fix was this:

1. Add the “debug mode” for the Avia Layout Builder by add this code to your functions.php:

//set builder mode to debug
add_action('avia_builder_mode', "builder_set_debug");
function builder_set_debug() {
	return "debug";
}

2. When editing the page, now you’ll see a text area appear under the layout builder. Copy the contents to a text editor (copy twice – once for a backup) and fix the HTML errors. Copy and pasted the fixed code back into the text area under the layout builder and save. That should fix it.