Plugin error

Hi there,
So I have tried installing this on a few wordpress blogs but none of them seem to work. Not sure if it’s my server’s PHP version or not (not sure how to check though).

The issue:
When I click the Afg+ button, nothing really happens except a little thing that says Afg is creating my review. Nothing happens after that, it hangs. I looked into the Review section and tried to create a new post only to be greeted by the following errors, I have included 3 errors out of a full page of errors:

Warning: Illegal string offset 'href' in /home/xxxxx/public_html/sandbox/wordpress1/wp-content/plugins/affiget-mini-for-amazon/review/elements/product-details/class-affiget-review-element-product-details.php on line 643

Notice: Uninitialized string offset: 0 in /home/xxxxx/public_html/sandbox/wordpress1/wp-content/plugins/affiget-mini-for-amazon/review/elements/product-details/class-affiget-review-element-product-details.php on line 643

Warning: Illegal string offset 'title' in /home/xxxxx/public_html/sandbox/wordpress1/wp-content/plugins/affiget-mini-for-amazon/review/elements/product-details/class-affiget-review-element-product-details.php on line 645

All the errors are relating to lines 643 to 636 relating to this part of the file

$value = sprintf( $link_template,
					esc_attr( $value['href'] ),
					esc_attr( $attr ),
					esc_attr( $value['title'] ),
					esc_html( $value['text'] )
			);
			return $value;

Can you please assist in how I can fix this error?

thanks

https://www.ads-software.com/plugins/affiget-mini-for-amazon/