Hi,

This error usually happens when you are trying to upload a file that exceeds the maximum file upload limit on your WordPress site. Your web server will fail to upload the file, and you will see the 413 request entity too large error page. Please contact your hosting provider to get help or self config by following this step.

Method 1. Increase Upload File Size Limit via Functions File

Open Appearance > Theme Editor, select Soledad then select file functions.php, add this content on the top of the file:

@ini_set( 'upload_max_size' , '64M' );
@ini_set( 'post_max_size', '64M');
@ini_set( 'max_execution_time', '300' );

Install plugin Htaccess File Editor – Safely Edit Htaccess File, then go to Settings > WP Htaccess Editor, add the following code at the bottom:

php_value upload_max_filesize 64M
php_value post_max_size 64M
php_value max_execution_time 300
php_value max_input_time 300

Another option: you can direct upload this theme via FTP.

Best Regards,
PenciDesign.