Login issues

I have a client that could not login to their site. They would attempt to login and get redirected back to the login page.

I attempted to delete the cache, no results. I disabled this plugin, she could then login. I then was able to enable the plugin and have the logins work. How can I see if the page is being cached? What logs can I send to help with an investigation or recreate the issue?

Here are the access logs. What is also strange is my Activity Log plugin shows a successful login. You can see some dashboard assets were loaded.

website.com 141.221.67.8 134.20.217.170 - - [02/Mar/2020:12:12:48 -0500] "GET /wp-admin/ HTTP/1.1" 401 401 "-" "Mozilla/5.0 (Windows NT 10.0; WOW64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/80.0.3987.122 Safari/537.36"
website.com 141.221.67.8 134.20.217.170 - - [02/Mar/2020:12:12:52 -0500] "GET /wp-admin/ HTTP/1.1" 302 - "-" "Mozilla/5.0 (Windows NT 10.0; WOW64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/80.0.3987.122 Safari/537.36"
website.com 141.221.67.8 134.20.217.170 - - [02/Mar/2020:12:12:53 -0500] "GET /wp-login.php?redirect_to=https%3A%2F%2Fwebsite.com%2Fwp-admin%2F&reauth=1 HTTP/1.1" 401 401 "-" "Mozilla/5.0 (Windows NT 10.0; WOW64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/80.0.3987.122 Safari/537.36"
website.com 141.221.67.8 134.20.217.170 - - [02/Mar/2020:12:12:53 -0500] "GET /wp-login.php?redirect_to=https%3A%2F%2Fwebsite.com%2Fwp-admin%2F&reauth=1 HTTP/1.1" 200 3990 "-" "Mozilla/5.0 (Windows NT 10.0; WOW64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/80.0.3987.122 Safari/537.36"
website.com 141.221.67.8 134.20.217.170 - - [02/Mar/2020:12:12:53 -0500] "GET /wp-content/plugins/google-analytics-dashboard-for-wp/front/js/tracking-analytics-events.js?ver=5.3.9 HTTP/1.1" 304 - "https://website.com/wp-login.php?redirect_to=https%3A%2F%2Fwebsite.com%2Fwp-admin%2F&reauth=1" "Mozilla/5.0 (Windows NT 10.0; WOW64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/80.0.3987.122 Safari/537.36"
website.com 141.221.67.8 134.20.217.170 - - [02/Mar/2020:12:12:53 -0500] "GET /wp-includes/js/jquery/jquery.js?ver=1.12.4-wp HTTP/1.1" 304 - "https://website.com/wp-login.php?redirect_to=https%3A%2F%2Fwebsite.com%2Fwp-admin%2F&reauth=1" "Mozilla/5.0 (Windows NT 10.0; WOW64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/80.0.3987.122 Safari/537.36"
website.com 141.221.67.8 134.20.217.170 - - [02/Mar/2020:12:13:00 -0500] "POST /wp-login.php HTTP/1.1" 302 - "https://website.com/wp-login.php?redirect_to=https%3A%2F%2Finl-dev.website.com%2Fwp-admin%2F&reauth=1" "Mozilla/5.0 (Windows NT 10.0; WOW64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/80.0.3987.122 Safari/537.36"
website.com 141.221.67.8 134.20.217.170 - - [02/Mar/2020:12:13:00 -0500] "GET /wp-login.php?redirect_to=https%3A%2F%2Fwebsite.com%2Fwp-admin%2F&reauth=1 HTTP/1.1" 200 4018 "https://website.com/wp-login.php?redirect_to=https%3A%2F%2Fwebsite.com%2Fwp-admin%2F&reauth=1" "Mozilla/5.0 (Windows NT 10.0; WOW64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/80.0.3987.122 Safari/537.36"
website.com 141.221.67.8 134.20.217.170 - - [02/Mar/2020:12:13:08 -0500] "POST /wp-login.php HTTP/1.1" 302 - "https://website.com/wp-login.php?redirect_to=https%3A%2F%2Finl-dev.website.com%2Fwp-admin%2F&reauth=1" "Mozilla/5.0 (Windows NT 10.0; WOW64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/80.0.3987.122 Safari/537.36"
website.com 141.221.67.8 134.20.217.170 - - [02/Mar/2020:12:13:08 -0500] "GET /wp-login.php?redirect_to=https%3A%2F%2Fwebsite.com%2Fwp-admin%2F&reauth=1 HTTP/1.1" 200 4018 "https://website.com/wp-login.php?redirect_to=https%3A%2F%2Fwebsite.com%2Fwp-admin%2F&reauth=1" "Mozilla/5.0 (Windows NT 10.0; WOW64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/80.0.3987.122 Safari/537.36"
website.com 141.221.67.8 134.20.217.170 - - [02/Mar/2020:12:13:23 -0500] "POST /wp-login.php HTTP/1.1" 302 - "https://website.com/wp-login.php?redirect_to=https%3A%2F%2Finl-dev.website.com%2Fwp-admin%2F&reauth=1" "Mozilla/5.0 (Windows NT 10.0; WOW64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/80.0.3987.122 Safari/537.36"
website.com 141.221.67.8 134.20.217.170 - - [02/Mar/2020:12:13:23 -0500] "GET /wp-login.php?redirect_to=https%3A%2F%2Fwebsite.com%2Fwp-admin%2F&reauth=1 HTTP/1.1" 200 4018 "https://website.com/wp-login.php?redirect_to=https%3A%2F%2Fwebsite.com%2Fwp-admin%2F&reauth=1" "Mozilla/5.0 (Windows NT 10.0; WOW64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/80.0.3987.122 Safari/537.36"
website.com 141.221.67.8 134.20.217.170 - - [02/Mar/2020:12:15:40 -0500] "POST /wp-login.php HTTP/1.1" 302 - "https://website.com/wp-login.php?redirect_to=https%3A%2F%2Finl-dev.website.com%2Fwp-admin%2F&reauth=1" "Mozilla/5.0 (Windows NT 10.0; WOW64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/80.0.3987.122 Safari/537.36"
website.com 141.221.67.8 134.20.217.170 - - [02/Mar/2020:12:15:40 -0500] "GET /wp-login.php?redirect_to=https%3A%2F%2Fwebsite.com%2Fwp-admin%2F&reauth=1 HTTP/1.1" 200 4018 "https://website.com/wp-login.php?redirect_to=https%3A%2F%2Fwebsite.com%2Fwp-admin%2F&reauth=1" "Mozilla/5.0 (Windows NT 10.0; WOW64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/80.0.3987.122 Safari/537.36"
website.com 141.221.67.8 134.20.217.170 - - [02/Mar/2020:12:49:25 -0500] "GET /wp-admin/ HTTP/1.1" 302 - "-" "Mozilla/5.0 (Windows NT 10.0; WOW64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/80.0.3987.122 Safari/537.36"
website.com 141.221.67.8 134.20.217.170 - - [02/Mar/2020:12:49:26 -0500] "GET /wp-login.php?redirect_to=https%3A%2F%2Fwebsite.com%2Fwp-admin%2F&reauth=1 HTTP/1.1" 200 2998 "-" "Mozilla/5.0 (Windows NT 10.0; WOW64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/80.0.3987.122 Safari/537.36"
website.com 141.221.67.8 134.20.217.170 - - [02/Mar/2020:12:49:36 -0500] "POST /wp-login.php HTTP/1.1" 302 - "https://website.com/wp-login.php?redirect_to=https%3A%2F%2Finl-dev.website.com%2Fwp-admin%2F&reauth=1" "Mozilla/5.0 (Windows NT 10.0; WOW64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/80.0.3987.122 Safari/537.36"
website.com 141.221.67.8 134.20.217.170 - - [02/Mar/2020:12:49:36 -0500] "GET /wp-login.php?redirect_to=https%3A%2F%2Fwebsite.com%2Fwp-admin%2F&reauth=1 HTTP/1.1" 200 3026 "https://website.com/wp-login.php?redirect_to=https%3A%2F%2Fwebsite.com%2Fwp-admin%2F&reauth=1" "Mozilla/5.0 (Windows NT 10.0; WOW64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/80.0.3987.122 Safari/537.36"