Uncaught ReferenceError: aagb_group_accordion_text_max is not defined

Used this plugin with success at the end of last year, it used to work nicely, now I’ve found that on the public page where I’m using it I receive the following error and accordions can’t open.

"Uncaught ReferenceError: aagb_group_accordion_text_max is not defined"

Trying to edit the page I’m seeing errors like this:

Block validation: Block validation failed for aab/group-accordion ( 
Object { name: "aab/group-accordion", icon: {…}, keywords: [], attributes: {…}, providesContext: {…}, usesContext: [], selectors: [], supports: {…}, styles: (3) […], blockHooks: [], … }
 ).

Content generated by save function:

<div class="wp-block-aab-group-accordion searchable aagb_accordion_192dd043-ca94-4d8d-b169-63f8c6df3d80 click"></div><div>
				<script>
				let aagb_group_accordion_text_max = 100					
				 </script>
				</div>

Content retrieved from post body:

<div class="wp-block-aab-group-accordion aagb_accordion_192dd043-ca94-4d8d-b169-63f8c6df3d80">

</div>

I’m not sure how to debug this, any hint please?

The page I need help with: [log in to see the link]