- Reload the UpdraftPlus page and wait for it to finish loading – just to make sure that you really do have this problem. (The message sending you to this page does not disappear until the page finishes loading – so, if for some reason a temporary network problem causes the page to not finish loading then you may need nothing more than to reload the page).
- Disable all your plugins except for UpdraftPlus.
- Switch your theme back to the WordPress default theme (Twenty Twelve, or Twenty Thirteen, etc., depending on your version of WordPress).
- Now reload the UpdraftPlus page. Does it show correctly? If not, then please report it to us – see here.
- If it does now show correctly, then it is one of your plugins or your theme which is breaking it. Re-enable them, one-by-one, and reload the UpdraftPlus page each time. The one that causes it to break upon being re-enabled is the culprit – report the bug to its makers (or replace it with an alternative). If you’ve got a huge number of plugins then you could take a more mathematical approach and re-enable/disable half of the potential culprits at a time in order to narrow down the offender more quickly. The best bet is often to use your intuition as to which of your plugins is slightly dodgy/low quality.
If that didn’t make a difference (it’s not guaranteed too – plugins and themes are not the only way to modify WordPress’s behaviour), then here are three more things to try:
- View the source of the UpdraftPlus settings page in your web browser – i.e. use the “View Source” feature in your web browser. Scroll to the bottom of the source – is any error message displaying there? If not, then edit your wp-config.php file and turn WP_DEBUG to true. Reload the UpdraftPlus settings page… does an error show now?
- If you open your web developer console (usually this is via Control-Shift-J or F12), then a helpful message might be there (or at least some message that will confirm the existence of problem).
- Finally: if your hosting company is Network Solutions, then you may have this problem instead: http://wordpress.org/support/topic/after-install-get-500-error-when-select-settings-interesting-fix?replies=7