The release setting of the Folder released outside may be set to "Unrelease".
Please check in the Folder settings screen that "Release" is selected for the Release Outside item.
※The default value is "Unrelease".
Related:
View and update folder settings (Web Browser)
https://teachme.jp/8/manuals/4929542
Tell me more about the Folder settings items
https://help.teachme.jp/hc/en-us/articles/14419216152985