Hello @kevweath,
and welcome to KNIME Community!
Guess you found this topic? User managed to connect to Snowflake with Okta adding &authentication=xxxx to the Snowflake connection string.
Additionally your error message seems like traffic network issue. There are many topics about it (and one FAQ question) and I suggest you search around forum a bit. Here is one that seems most similar to yours after a quick search:
And last but not least there is plan to have a dedicated Snowflake connector in future. Stay tuned!
Br,
Ivan