Non-Trusted Certificate preventing scheduled FTP connection -- Please help!

We use WS_FTP to schedule nightly FTP transfers to and from Box. Lately these transfers have failed, and I suspect (as well as hope) that the culprit is a Non-Trusted Certificate (see screenshot)!


I need to remedy this quickly, because copying these files manually is setting me and others behind at work. I’m reluctant to “trust this certificate” as I’m filling in on this task (with others falling to my colleagues) for my CIO who is out on extended leave, and I’m not sure what potential liabilities I might expose my employer to.

Is this something Box support can help me with? DigiCert, Inc. support was unable to address this issue and didn’t think I could do much about it either; they basically said Box would have to reorder and reinstall this certificate.