Hello,
You need to use child theme only in case you want to make custom changes in files, because changes in parent theme files will be lost after the update. If you do not make changes in files, the child theme is not required. The parent theme is activated on your site, so to solve this problem – https://prnt.sc/odO3QLj_1OeH delete your custom child theme. Please note that we are not responsible for custom changes that you do in the child theme.
If you are worried about losing data while doing any actions with the child theme, create a full backup to be able to restore the site from backup if something goes wrong.
Regards