Are you a member of the folder?
Folders that you are not a member of are not displayed on the screen.
If necessary folders are not displayed, please request the administrator to add you as a user to the folder.
Related: Add or remove users from folder (Web Browser)
https://teachme.jp/8/manuals/4929449
Are you accessing from a permitted IP address?
You may be connecting from an unauthorized IP address.
Please check the allowed IP addresses and the IP address you are connecting from.
Related: Set up IP restriction for Group-shared folder (Web Browser)
https://teachme.jp/8/manuals/9117240