Michael v.d. Berg

Try to use this page of the WordPress community. Mostly you have login into your main domain (www.domain.com/wp-admin).

When you are in the dashboard, you can choose your website into the menu bar at the top of your screen. Hopes this will help you out ??

Maybe you can trie to do this with a page building plug-in. For example this one

Did you tried to force your http connection to https with a .htaccess file? After that you can delete the WP Super Cache plug-in and reinstall the WP Super Cache again on your secure WordPress website. Sometimes this will resolved the issue.

I can’t help you futher, because I didn’t use this plug-in.

I resolved this issue by edit the checkboxes in the settings. It’s works fine right now!

You can follow this tuturial to get your WordPress website into HTTPS. Sometimes is your media (images etc.) mixed content. You can resolved this issue with the following plug-in.

Hi Emile,

To change the url names from /?p=1234 to /product-article-1/ you have to follow this tuturial: https://www.wpbeginner.com/wp-tutorials/how-to-create-custom-permalinks-in-wordpress/

Your can redirect them with a .htaccess file in the root. Your can create something like:
Redirect 301 /?p=1234 https://domain.com/products/product-article-1/

I tried to visit your website, but I still get a message from Google that the server is too slow to connect met with your website. Do you have two systems in your root folder?

Hmm… Something interisting. Did you have already bought a SSL Certificate? Maybe you can follow this instruction https://www.wpbeginner.com/wp-tutorials/how-to-add-ssl-and-https-in-wordpress/.

I could have a look at your site, but I have to get the URL of your domainname to see what the problem could be.

You are welcome! Maybe you have to look at this website: https://www.wpbeginner.com/wp-tutorials/how-to-fix-the-internal-server-error-in-wordpress/

Please let me now if this resolved the problem or not. Maybe there is something else what create this error.

What for warning did you get? Is it a certificate written by an official company or by yourself?

You can resolve the mixed content to add the following code to your .htaccess file:

# BEGIN WordPress

RewriteEngine On
RewriteCond %{SERVER_PORT} !^443$
RewriteRule (.*) https://%{HTTP_HOST}%{REQUEST_URI} [R=301,L]
RewriteBase /
RewriteRule ^index\.php$ – [L]
RewriteCond %{REQUEST_FILENAME} !-f
RewriteCond %{REQUEST_FILENAME} !-d
RewriteRule . /index.php [L]

# END WordPress

Is there in your style.css file of your template a CSS code lookslike header-image hover? Or something like that. If so, you have to try to delete that one and have a look if it has been changed.

What for update did you do? Have a look at your .htaccess file. (For more details about the .htaccess file: https://codex.www.ads-software.com/htaccess).

Did you have already try to re-upload the core files of WordPress to your server?

You can valid your AMP page on: https://validator.ampproject.org/. If there are errors, you will get a message to resolve them for a supported AMP page.

Deactivating and re-activate works. The error message is gone! Thank you Chouby!

Thanks for your reply Chouby, but unfortunately I am still get this error. I am using WordPress 4.7, Polylang 2.0.12 and Polylang slug 0.2.0.

This problem is since the update of Polylang 2.0.11. I hope to find the problem soon. The Polylang is still working for now ??