I can't really help much more but will contact Neil to see if he can get someone to look into it. In the past the "bad referrer" did seem to be related to flash as Frances mentioned but that has not been used for over a years worth of mags now.
In the mean time I suggest using Pocketmags to view which will hopefully be OK.
Other options that seem to have helped in the past are clearing your cache, trying to view from another device preferably on a different internet connection as that will eliminate your ISP as an issue such as mobile phone or work computer.
Edited By JasonB on 12/08/2020 07:24:23