Internal server error Seafile Client

Hi all,

We uprgraded our seafile CE from 6.2.5 to 7.0.5 on our Ubuntu server 14.04. Everything works fine when we connect to the seafile server via a browser (https://) : i can access to all my libraries
When we connect via the client v7.0.2 i have this message : “Internal server error”. My login (mail address) is correct and my password too.

Please tell me what’s wrong ? Best regards Fred