Undefined array key multiple errors

I came to my website today, and found a number of things needed updating, which I did and then found the site said it was going into maintenance mode. So I left it and it did whatever it was doing and all seemed fine. Then I tried to do something, cannot remember what it was, and got the block of errors below on a white page. I clicked back and that worked so I was in the site again, all seemed okay.

Since it indicated that WP-Reset was named in this, I decided to turn the plugin off and then come here. I went to deactivate it and the same page came up again. I was again, able to go back and then reloaded the page, but WP-Reset had not turned off. I tried again, in a new tab, but the same thing happens each time. I click deactivate (or any other thing to do with it on the plugin page) and this appears, and it does not turn off. I thought it was probably best to check this out with you, since clearly I use WP-Reset to back up and manage things to do with emergencies, before doing something important on the site that causes damage.

Thanks for any guidance you can give.

Jonathan

Warning: Undefined array key “auto” in /homepages/4/d899045802/htdocs/clickandbuilds/JEFReSH/wp-content/plugins/wp-reset/wp-reset.php on line 174

Warning: Undefined array key “auto” in /homepages/4/d899045802/htdocs/clickandbuilds/JEFReSH/wp-content/plugins/wp-reset/wp-reset.php on line 174

Warning: Undefined array key “auto” in /homepages/4/d899045802/htdocs/clickandbuilds/JEFReSH/wp-content/plugins/wp-reset/wp-reset.php on line 174

Warning: Undefined array key “auto” in /homepages/4/d899045802/htdocs/clickandbuilds/JEFReSH/wp-content/plugins/wp-reset/wp-reset.php on line 174

Warning: Undefined array key “auto” in /homepages/4/d899045802/htdocs/clickandbuilds/JEFReSH/wp-content/plugins/wp-reset/wp-reset.php on line 174