Blank screen unfinished save or options

Does this happen on that one page or other pages as well?
Try activating DEBUG mode, and look for errors.

others as well, and not every time… sometimes the intended feature I’m trying to navigate does show, and then trying to do anything from there leads to big blank white dead end. I’ll try to figure out DEBUG mode, thank you.

in DEBUG mode:
https://www.brewsofsantacruz.com/wp-admin/update-core.php

leads to: Fatal error: Internal Zend error – Missing class information for in /home/myuser/public_html/wp-content/plugins/wp-super-cache/wp-cache-base.php on line 5

which would be in this block of the wp-cache-base.php:

if (!class_exists(‘CacheMeta’)) {
class CacheMeta {
var $dynamic = false;
var $headers = array();
var $uri = ”;
var $post = 0;
}
}

?????

Just disable that plugin, and use an alternate caching plugin.