This has been happening to me rather a lot lately: I start a search, it runs for a few seconds, then I get a message saying, “This forum requires that you wait 120 seconds between searches. Please try again in 88 seconds.” Always “88 seconds” or sometimes 89.
You should do a search first. 
^ I’ve been getting this all morning.
Determining whether or not a thread had already been started on the issue required a bit more reading than usual. 
It’s neo-nazi hamsters! I keep telling people, but no-one believes me!