Native Ads are not displaying specific to just Chrome.

I see the Ad Inserter executing when I run inspect.
I notice the following inside the html.

On Internet Explorer/Edge the amazon script is identical to what I pasted inside Ad Inserter block 15. The Ad displays on these browsers without any issue.
<script type=”text/javascript”>
amzn_assoc_tracking_id = “pcb0ed-20”;
amzn_assoc_ad_mode = “manual”;
amzn_assoc_ad_type = “smart”;
amzn_assoc_marketplace = “amazon”;
amzn_assoc_region = “US”;
amzn_assoc_design = “enhanced_links”;
amzn_assoc_asins = “B01N9KSITZ”;
amzn_assoc_placement = “adunit”;
amzn_assoc_linkid = “de27f3da2e6713dcd77ac8ada15e5cc0″;
</script>
<script src=”//z-na.amazon-adsystem.com/widgets/onejs?MarketPlace=US”></script>

On Chrome however I notice a guid is pre-pended to the start of the type “e137813398cd4f68ec3ca802″ & the Ad never displays (same issue for all my ads). I notice the guid value changes on refresh of the page.

<script type=”e137813398cd4f68ec3ca802-text/javascript”>amzn_assoc_tracking_id = “pcb0ed-20”;
amzn_assoc_ad_mode = “manual”;
amzn_assoc_ad_type = “smart”;
amzn_assoc_marketplace = “amazon”;
amzn_assoc_region = “US”;
amzn_assoc_design = “enhanced_links”;
amzn_assoc_asins = “B01N9KSITZ”;
amzn_assoc_placement = “adunit”;
amzn_assoc_linkid = “de27f3da2e6713dcd77ac8ada15e5cc0″;</script> <script src=”//z-na.amazon-adsystem.com/widgets/onejs?MarketPlace=US” type=”e137813398cd4f68ec3ca802-text/javascript”></script>

I also noted the following error is generated per each add that exists on any given page.
onejs?MarketPlace=US:1 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

I have disabled WordPress caching for investigation however I can’t find any Debugging option inside your plugin. Your help says its found under: (tab ? / Debugging)
What does that mean? I can’t find any debug tab.
Thanks in advance!
–Richard.

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