Hey there,

I am really sorry for the delay of this reply as it is a weekend for us here.

After troubleshoot long hour ago, it seems like this plugin Open Graph - EasyBlog causing this redirection error, I already help you disabled it, it should work fine now.

Regarding with your second issue :

Error
Invalid field: Redis Server Port

I was unable to figure out this, but it seems like you are not alone, other user also hitting this as well, you can check following thread.
https://forum.joomla.org/viewtopic.php?t=949828

Hi Arlex,
thank you for your engagement on weekend. Over time, too many unused components and plugins have accumulated on http://www.picton.place. It is time to dust off the website. Since the other websites work well (same joomla version, same easysocial and easyblog versions) I believe that a long forgotten plugin here interferes. First i will backup the site und update to 3.7.3. Lets see, what the Redis port does after that. (changing the config.php had no affect).
Thanks so far, I will keep you up to date.
Peter

Thanks for updating us on this Peter. Yep, having too many unused plugins / extensions may become an eye sore overtime and this is why we always recommend you to remove plugins / modules / extensions that are not used.