Thank you, Barb, for helping me last night!
I was on the forum earlier in the evening without any problems. A few hours later, I had a problem with my wireless router, so used my phone as a hotspot to try to access the form. I got a message saying I was banned from access, due to "excessive flagging".
I had no idea what this meant, so I emailed the team, and Barb answered. She checked my account from their end, told me I was not banned, then explained that a hotspot can alter an IP address, and I must have been using a banned IP address with the phone connection
I'm now using a new wireless router and all is well. 😊