TlsHostCertificateFingerprint

I'm using automation 5.7.5 in Visual Studio, C#. Attempting to perform an FTP transfer with TLS with the following code:
But I always get the following error:

TLS host certificate fingerprint \"‎‎f0:c4:75:a9:be:75:14:aa:d6:14:e9:84:8d:6b:39:06:c1:98:a3:00\" does not match pattern /([0-9a-f]{2}:){19}[0-9a-f]{2}(;([0-9a-f]{2}:){19}[0-9a-f]{2})*/

The pattern definitely looks like it matches but I can't get past it. Please help. Thanks!

You have a hidden hidden left-to-right mark (E2 80 8E) as the beginning of the string.
https://www.fileformat.info/info/unicode/char/200e/index.htm

For a general discussion of the error message, see:
SSH host key/TLS host certificate fingerprint “…” does not match pattern “…”