amazon affiliate search ad script: Uncaught TypeError: Cannot read property 'getBoundingClientRect' of null

I have embedded Amazon affiliate native search Ad on my website. When I test it my dev laptop, the "Search ad" displays without any issues. However when deployed to hosting Provider, encounter runtime error and amazon search Ad not displayed. Please help here.

Error:

   Uncaught TypeError: Cannot read property 'getBoundingClientRect' of null
        at Object.v.getAAXUrl (onejs?MarketPlace=US:1)
        at Object.render (onejs?MarketPlace=US:1)
        at onejs?MarketPlace=US:1
    v.getAAXUrl @ onejs?MarketPlace=US:1
    render @ onejs?MarketPlace=US:1
    (anonymous) @ onejs?MarketPlace=US:1




//Amazon generated code

<script type="text/javascript">
amzn_assoc_placement = "adunit0";
amzn_assoc_search_bar = "true";
amzn_assoc_tracking_id = "******-**";
amzn_assoc_search_bar_position = "bottom";
amzn_assoc_ad_mode = "search";
amzn_assoc_ad_type = "smart";
amzn_assoc_marketplace = "amazon";
amzn_assoc_region = "US";
amzn_assoc_title = "Shop Related Products";
amzn_assoc_default_search_phrase = "watches";
amzn_assoc_default_category = "All";
amzn_assoc_linkid = "*********";
</script>
<script src="//z-na.amazon-adsystem.com/widgets/onejs?MarketPlace=US"></script>

from amazon affiliate search ad script: Uncaught TypeError: Cannot read property 'getBoundingClientRect' of null