Illegal string offset

I see you have not answered the other support ticket about this, and that was four months ago. If you are not going to support your plugin then I will give it a negative review.

I am getting this error:

Warning: Illegal string offset ‘adrl_adv_id’ in /home/…/wp-content/plugins/adroll-retargeting/wp-adroll.php on line 69

and this:

Warning: Illegal string offset ‘adrl_pix_id’ in /home/…/wp-content/plugins/adroll-retargeting/wp-adroll.php on line 77

https://wordpress.org/plugins/adroll-retargeting/