website down – due to lastest update

My website is down due to the latest update from Rank Math 8 hours ago. My host is with Siteground and they have told me to work with you.

I have disabled Rank Math and my website works. Can you please help me to have the Rank Math plugin work on my website without having it down?
Thanks!
Sharee
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This is the response from Stieground:

Thank you for contacting our help desk.

There was a faulty PHP handler in the .htaccess of your website, which was causing the issue:
baseos | u****************@u******************:~/www/choosingwisdom.org/public_html$ grep php70s .htaccess
AddHandler application/x-httpd-php70s .php

I removed it and now the website is no longer downloading the file.

Please flush your browser cache and verify the result on your end:
https://www.siteground.com/kb/how_to_clear_cache_in_firefox_internetexplorer_safari_opera/

However, the website is now stuck in a redirection loop:
HTTP/2 301
server: nginx
date: Wed, 09 Feb 2022 15:10:01 GMT
content-type: text/html; charset=UTF-8
location: https://www.choosingwisdom.org
expires: Wed, 11 Jan 1984 05:00:00 GMT
cache-control: no-cache, must-revalidate, max-age=0
x-redirect-by: Rank Math
x-httpd: 1
x-endurance-cache-level: 2
x-nginx-cache: WordPress
host-header: 8441280b0c35cbc1147f8ba998a563a7
x-proxy-cache-info: DT:1

HTTP/2 301
server: nginx
date: Wed, 09 Feb 2022 15:10:02 GMT
content-type: text/html; charset=UTF-8
location: https://www.choosingwisdom.org/downloads/creating-positive-habits-journal/
x-redirect-by: Rank Math
cache-control: max-age=300
expires: Wed, 09 Feb 2022 15:15:01 GMT
x-httpd: 1
x-endurance-cache-level: 2
x-nginx-cache: WordPress
host-header: 8441280b0c35cbc1147f8ba998a563a7
x-proxy-cache-info: DT:1

The faulty redirect comes from the Rank Math plugin.

What I can suggest you is to access the admin page of your website -> Click on the Rank Math button at the top of the page (https://imgur.com/a/vea4yTE) -> Select Redirections -> Manage Redirections and remove the faulty redirection.

If you need assistance with setting up the correct redirections in the Math Rank plugin in order to achieve the optimal result, my recommendation is to contact your developer, as he should be able to further assist you with this task.