Hello,
We are looking into this same issue with Shopify, we've recieved intermittent 803 and 804 error notifications from Moz on a Shopify store. Specific to these errors Shopify put forward a possible cause and we were wondering if this is correct or not. The thread on Shopify is located here:
https://ecommerce.shopify.com/c/ecommerce-marketing/t/crawl-errors-337539#comment-351993
Their suggestion on what the issue may be is as follows:
"I've been having a read through of this thread and one possibility for the 803 errors showing up on MOZ is that they may not be able to use SNI (Server Name Indication extension). If they don't use SNI then it would make sense that Shopify stores with an SSL certificate would pull up errors like that. We can't help troubleshoot MOZ's service directly, but that could be a good place to start with some of these errors."
Would you be able to offer any feedback on this being the cause of the errors?
Thanks!
