Despite the spinner, the site loads.
This may be a plugin or theme conflict. Please attempt to disable all plugins, and use one of the default (Twenty*) themes. If the problem goes away, enable them one by one to identify the source of your troubles.
If you can install plugins, install “Health Check”: https://wordpress.org/plugins/health-check/ On the troubleshooting tab, you can click the button to disable all plugins and change the theme for JUST you, while you’re still logged in, without affecting normal visitors to your site. You can then use its admin bar menu to turn on/off plugins and themes one at a time. See https://make.wordpress.org/support/handbook/appendix/troubleshooting-using-the-health-check/ for more information.
See http://www.wpbeginner.com/plugins/how-to-deactivate-all-plugins-when-not-able-to-access-wp-admin/
Thank you for your reply.
But I have already deactivated all plugins and changed my theme. The problem is that I can access the website when I am logged in to the admin panel. However, I cannot access the site if I am not logged in.
The problem only applies to the homepage https://limendo.menu/
I wanted a redirect to the provisional homepage https://limendo.menu/startseite-de/ but this only works if you are logged in to the admin panel. However, this page can be accessed in other browsers / if you are not logged in: https://limendo.menu/startseite-de/
Hi there,
I’d recommend checking your site’s browser console as there appears to be some errors being thrown. In particular, a 404 error is being logged in the console regarding a missing JS file from a caching plugin (Supercache). It looks like it’s trying to find a JS script located in ‘wp-content/cache/autoptimize/js/ directory.
You may also want to consider checking your PHP error logs and see if there’s any errors being logged there.
Regards,
Tyler
Clear the page cache(s) (WP Fastest Cache for one) and all should be OK.
Thank you for your help. I cleared the caches but it still doesn’t work. What else could I try?
Given the site works with a “cache busting string” appended to the URL, I think there is some other cache involved maybe?

Thanks again for your help. The problem was the Wp Fastest Cache plugin. I deleted all my caches and deactivated this plugin.