When I try to customize the layout by going to appearance -> Customise, the right column is blank as shown in the attached image, and I can not edit the layout.
I have tried deactivating all the plugins but did not work. How can I fix this? Thanks!
I tried with other themes, and the blank only happened with Illdy.
I also tried with the English version of Wordpress with another website of mine to see if it is due to the Japanese language, but the blank happened again in that case too.
Thank you, Yusuke!
Can you please create for me a WordPress admin user so I can take a look and investigate?
Please make your reply private if it contains login information!
From what I can see you are using older version of both WordPress and PHP, see my screenshot: Screenshot - 0c3169c384be9345181ad5fab6c1e4da - Gyazo
I would recommend to upgrade to the latest version of WordPress by going in your dashboard and click on the message you see here: Screenshot - a97101178b39cbaca8888ff365452c08 - Gyazo
And then talk to your hosting company and ask them to update your PHP version to at least 5.6
Once you do this, please let us know if the issue persists!