I was attempting a test publication of an old Markdown document and it failed with dire warnings that I was attempting to cause harm. The only Markdown directives were # and ## section headings. Nothing else.
On a guess, I removed removed a line containing a web address, and the remainder of the document passed, and looked OK. I was publishing without logging in to write.as as I did not want to keep the result.
So, what is it about an internet address that sets off alarms? I dread to include it here, but it was a github address. Ideas? Thanks.