marty That's not really all that helpful. The phpBB installation instructions assume a dedicated server, and the nginx instructions and sample configuration file is not a straight drop-in for a wordops managed system.
I was able to figure out and fix the various obvious 'location / not allowed' errors (as it was a duplicate of the common conf files, but I am still let with a 502 Bad gateway error - which I suspect is due to the rewrite configuration of the sample config file provided.
I will paste/post this sample config as a separate message following this comment, and maybe someone can help point out how it would need to be altered to work on a wordops managed system.