Hi @MarcNathmann,
Thanks for reaching out.
Importing is the only option to get the Design Clouds installed on your website. I would suggest you try changing the PHP environment variables value through the wp-config.php file by writing the following code, if that does not help you anyway, you need to think of your Hosting Services.
@ini_set( 'display_errors', 0 );
@ini_set( 'upload_max_size' , '64M' );
@ini_set( 'post_max_size', '64M');
@ini_set( 'max_execution_time', '300' );
@ini_set( 'max_input_time ', '300' );
Please learn how to modify the wp-config.php files from this video:
You can also try to troubleshoot the common issues from here -> https://theme.co/docs/common-issues. It’s important that you do not skip any of those troubleshooting procedures because they are all relevant to your case.
Hope it helps.
Thanks