If you mean FTP-SSL/TLS then it might work., (SFTP or FTPS like some write it, It NOT FTP. and is not supported. It is an entire other protocol even if they are named similar)
But FTP over SSL/TLS is.
MC is using Windows for the SSL/TLS layer. and that error is because it failed to initialize a context with the requested cipher.
A lot of chiper combination is disabled in Windows. because they are consider unsafe or other reason. But you can enabled them in Windows.
In the log it should output what chiper it tries to use.
Like
"Connected using : TLS_ECDHE_RSA_WITH_AES_256_CBC_SHA"
If a chiper is disabled in Windows it can be enabled. it is a bit tricky. But this program can be useful when changing what chiper Windows is allowing
https://www.nartac.com/Products/IISCrypto/
