Diễn đàn giúp em? khi em cài plugins MathType thì nó báo lỗi này "There is a request to install plugin MathType filter by WIRIS (filter_wiris) version 2020022400 from the Moodle plugins directory on this site. However, the location /home/u983461675/domains/hoclieuonline.com/public_html/filter is not writable. You need to give write access for the web server user to the location, then press the continue button to repeat the check"