WordPress 5.5 was released on August 11, 2020.
With this upgrade, the theme has a big layout break on the editor side.
This is because the DOM structure on the editor side has been changed, and the CSS of the theme is not applied correctly anymore.
I’ll plan to release a 5.5 compatible theme on this site by the end of this month at the latest and apply for the official directory at the same time.
We apologize for any inconvenience this may cause to users of this theme, please be patient.