One tip I have is to check what URL you have set in Google’s search console. Do you still use the http version inside search console? Do you use the www version?
Cause : Redirect errors are typically caused by one of the following:
There was a redirect chain that was too long (use 3 max)
There was a redirect loop (A points to B which points to A…)
The redirect URL eventually exceeded the maximum length (this can be a problem when you’re redirecting within layered navigation and/or when adding query parameters)
There was a bad or empty URL in the redirect chain
Fixing these errors : Review all of your redirects and ensure there is only a single redirect whenever possible. The Chrome Extension “Ayima” is great at detecting if a page has been redirected, where it redirects to, and the number of redirect hops present, which should help identify issues on a page-by-page basis.
I installed the Ayima extension as you suggested and it confirmed that there are no redirects happening, so any issue with the redirect chain is surely a moot point…
Thanks RDaneel, please see my response inline above. Also in answer to your question I’ve tried testing the http, https and www versions in Search Console and Google throws back the same error for all of them…