FTP Connection Problem with i-mscp 1.2.0 and Filezilla 3.10.0.1

    Hello,


    I have another strange Problem with the following configuration:


    i-mscp 1.2.0
    New Filezilla Version 3.10.0.1


    i-mscp has enabled SSL for customers and admin panel and installed a Wildcard SSL Certifiate.
    The Admin Panel etc. works correctly. But there seems to be a Problem with the TLS SSL connection.


    I am trying to connect to the Server via the new default option: "Use explicit FTP over TLS if available"
    When I am trying to connect I get: "Unknown certifikate" and i need to press okay to continue.


    Filezilla tries to following:



    and aborts with the following:



    I also checked the "imscp_services.pem" and the servername_default .pem file. Both files include the Private Key, Certifiate and the Intermediate Certificate.

    Version imscp 1.2.9
    debian 8
    proftpd 1.3.5
    I tried to change the passive mode but does not work, sometimes showing directories and other non out that error, you can help me?