Welcome to the Q&A Forum

Hi there First, take a look at Errors in Crawl Reports - there is a lot of great information in there and it's a great resource to help you when you encounter odd or unfamiliar errors. There are actually quite a few Q+A threads about these exact issues: How Do I Troubleshoot 804 HTTPS Crawl Error? (Moz) 804 HTTPS (SSL) error (Moz) How do fix an 803 Error? (Moz) I would take a look at the following resources because more often than not, this is a mixed protocol configuration: Configuring HTTPS servers Configuring HTTP and HTTPS Sometimes it's also because of mixed content. I would also take a look at these mixed content resources: Fixing “Mixed Content” Errors Using Protocol Relative Links To Fix Mixed Content Warnings This should give you a solid place to start! Hope this all helps - good luck!