Error server

hello the system send me an error. everytime when I will start the configuration of the theme, I got the message of an error with the server and I should contact the admin. can someone help me with that problem ?

thanks marcus

I can edit some of the theme-settings by example the widget area, or the editor but I can not go to the settings fpr background or header. if I klick on the button for customize with the following link
the browser starts and it doesn´t work, the following site is empty. I tried to uninstall the theme and install again but its the same problem. has anyone an idea ?

Hello Marcus,

Can you please provide the exact text of error that you are getting?

Kind Regards, Roman.