Fail to create rules due to incorrect tag values [#3311008]

Failing to create rule.
There is a an ajax error in chrome dev console.
The specified #ajax callback is empty or not callable

Drupal 9.4.6
Business Rules 2.0 Beta1

The problem was caused by
1. An implode exception where the second argument being a string instead of an array
https://git.drupalcode.org/project/business_rules/-/blob/2.x/src/Form/Bu...

3. And that causes the ajax form builder unable to find the correct triggering form element, causing the ajax form error.

Idea solution:
Fixed the tags input so that its value is an array instead of a string. But I am not sure how to do that.
https://git.drupalcode.org/project/business_rules/-/blob/2.x/src/Form/Bu...

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3311008-fail-to-create changes, plain diff MR !10
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