Thanks for your patience. I think I’ve sorted out a problem people were having when trying to leave comments. Here is the fix.
Enter your comment in the comment window, then scroll down to the Choose an identity section.
If you already have an online Google or other social media account, that options is probably selected and you can use that.
If you don’t have an online Google or other social media account, choose the “Name/URL” option, as follows:
Email me if you have any trouble.