Thanks for your response.
Only notices are showing in the log file.
PHP Notice: Undefined property: WP_Error::$lists in /server_dir/wp-content/plugins/wordpress-popup/inc/providers/opt-in-mailchimp.php on line 221
PHP Notice: Undefined property: WP_Error::$total_items in /server_dir/wp-content/plugins/wordpress-popup/inc/providers/opt-in-mailchimp.php on line 222
PHP Notice: Undefined property: WP_Error::$total_items in /server_dir/wp-content/plugins/wordpress-popup/inc/providers/opt-in-mailchimp.php on line 477
PHP Notice: Undefined property: WP_Error::$categories in /server_dir/wp-content/plugins/wordpress-popup/inc/providers/opt-in-mailchimp.php on line 481
PHP Notice: Array to string conversion in /server_dir/wp-includes/general-template.php on line 4230
Currently, PHP version is 5.5.23
PHP version was 5.2.17 after that server team upgraded using AppHandler ( They defined in .htaccess file – AddHandler application/x-httpd-php55 .php )
Previously I’m getting the “Something went wrong. Please try again.” error while updating the Fetch lists. Below is the error message was came at that time,
PHP Fatal error: Cannot use object of type WP_Error as array in /server_dir/wp-content/plugins/wordpress-popup/inc/providers/opt-in-mailchimp-api.php on line 58
After that only I requested for upgrade from my server side team.
Checked from php version using phpinfo function – 5.5.23
While checking the php version from terminal ( using ssh )
It showing 5.2.17.
Is that reason for the issue?