Hi Joe,
Thanks for the reply.
No CDN is involved. I have a simple Virtualmin setup. The server runs only Virtualmin GPL, and three virtual servers each running email software (sendy.co), and that’s it. Has been running fine for more than 2 years. Somebody has responded to my post on the LE forum that he/she is getting the same error with Virtualmin. The latest Virtualmin updates corrected errors to do with LE renewals, so I wondered whether I have become caught up in that.
Next step? If I pay $60 for a Virtualmin Pro annual licence, could support look at my GPL set-up and work out what is going on?
Maynard