FileZilla showing Certificate as expired

[macsuibhne]

I've got hosting from HostGator and I'm using their free SSL. I know the cert is valid and has not expired. This can be checked easily.
But when I try to connect via FTP using FileZilla I get a 'Unknown certificate' warning.

The Valid to field shows: 16/10/2018 00:59:59 - Certificate expired!
The Host field show: www.****.com:21 - Hostname does not match certificate

(**** being my domain)

The 'Always trust certificate in future sessions' option is greyed out'

I've checked the SSL on sslshopper.com and everything get a green tick, including the expiry date.

Does anyone know how to resolve this issue?

[boco]

Deleted, wrong assumption.

[botg]

@boco: FileZilla always displays times using the user's local time zone.

@macsuibhne: Could the webserver by chance use a different certificate than the FTP server?

[Lutz]

Hallo,
when I connect to my NAS, I also get the message "Certificate expired".
I do not get a new certificate for my NAS (badly supported)
The problem I have is that the checkbox "Always trust the certificate" is grayed out.
(I am sure, I can trust my own NAS)
As I can't mark the checkbox, I always have to reconfirm, that I want to use the NAS.
(This happens several times, if I want to update multiple folders on the NAS in one step)

Why is the checkbox grayed out ?
Does someone know, how I can tell the Filezilla client, that I want to trust my NAS in future ?

[botg]

If you cannot replace your NAS' certificate you need to return it to your vendor and demand a refund. With that money you purchase a new NAS where you can renew the certificate.

[boco]

Expired certificates are invalid. You cannot permanently trust invalid certificates with FileZilla.