Cannot connect to Panel on Server - Strange Errors


I successfully uploaded a site for a client on a server without SSL (http: and not https:)

The site itself renders after activating the line

RewriteBase /

in .htaccess.

However we are not able to connect to the panel which had already been activated locally. When I set debug to true, I get different errors on various browsers when I try to connect to the panel:

Safari: Preflight response is not successful
Chrome: Failed to fetch
Firefox: NetworkError when attempting to fetch resource.

Strange. Can somebody help?

Best Regards


Could you please let us know your Kirby & PHP versions?

PHP: 7.3.24
kirby: 3.0

Thanks for any help.


Really 3.0? Then you should probably update to the latest version 3.5.1.

It is based on the Shuffle theme purchased from the theme-site. The Kirby version is included in the theme. Probably it would break the layout when I update to Kirby 3.5.

I uploaded the same package to another server, where it works flawlessly. I mean the site and the panel work.

That’s why I think that this is not a problem concerning versions.



Older Kirby 3 versions used the fetch request which is not supported by default on all servers. That’s why that was changed later.

Ideally, themes shouldn’t ship with Kirby and particularly not with outdated Kirby versions. When did you buy the theme? Only recently? Then I’d try and update and if that doesn’t work without issues, I’d contact the theme developer because you can expect to get an up to date Kirby version with a paid theme.

After all, Kirby has shipped with some security updates in the meantime and Kirby 3.0 is 2 years old.

Actually, the developer is not at fault. He pointed out that he is developing an update and will ship it soon.
I will try what you said (update to 3.5) and tell you about the result.



I just uploaded the 3.5 starter kit on the same server.

Changed the config to

‘panel’ =>[
‘install’ => true

When I call the panel I get the same results.

If I activate RewriteBase in .httaccess to:

“RewriteBase /” I get:

Safari: Preflight response is not successful
Chrome: Failed to fetch
Firefox: NetworkError when attempting to fetch resource.

If I activate RewriteBase in .httaccess to:

“RewriteBase /DRoPS” I get:

# Internal Server Error

The server encountered an internal error or misconfiguration and was unable to complete your request.

Please contact the server administrator at to inform them of the time this error occurred, and the actions you performed just before this error.

More information about this error may be available in the server error log.

Additionally, a 500 Internal Server Error error was encountered while trying to use an ErrorDocument to handle the request.

Thanks for your help.

Then it seems to definitely be an issue with the hosting provider. Are you bound to that provider? Who is it?

Is there any more information in the server error logs?

Nothing relevant in the server error logs.

Will find out and inform you.


I think the problem has something to do with the a domain-redirect. Nothing to do with the Kirby installation.
Sorry for bothering you.