Can't see e-mails in folder where i have e-mails

[hitachicm615]

Hello everyone,

I'm using Roundcube as interface to see all my saved e-mail on my server.
Today, i need to see losted e-mail on my Outlook and i can't open my folder.
Roundcube says me : "No e-mails are available in ... folder"
However, I have 60249 e-mail in this folder (see my screenshot)

How i can fix it ?

Best,

Hitachi