This is usually because of insufficient server resources. Happened to me recently on a test installation.
Try increasing max_input_vars and WP_MEMORY_LIMIT. That solved the issue for me.
See https://forum.tagdiv.com/requirements-for-newspaper/
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This reply was modified 7 years by
menneskedyr.
WP_MEMORY_LIMIT is set in wp-config.php:
define( 'WP_MEMORY_LIMIT', '256M' );
max_input_vars is set in php.ini, user.ini or .htaccess file, depends on how your server is configured – if you don’t know how to find it you’ll have to ask your host to do that for you.
It’s all described in https://forum.tagdiv.com/requirements-for-newspaper/
Hi,
Please make sure that the theme system status is configured as mentioned in the requirements guide. Please follow the guide carefully
– https://forum.tagdiv.com/requirements-for-newspaper/
Thank you.
Perhaps your numbers are still too low. It would probably be a good idea to check with your host.