When I add any value that is not empty string "" to Discord Bot token I get JsonSerializationException in the server console. Token is 100% corrrect, I use that in other plugins.
When I set it to empty string - no such error seen - so this is not an issue with JSON formatting.

Anyone experienced this before?

This is what I see in the console:
12/04 08:04:41 | [DiscordExtension] [Info]: Discord socket connected!
12/04 08:04:42 | [Discord Core] Connected to bot: OLD FARTS RUST
12/04 08:04:42 | [DiscordExtension] [Info]: Your bot was found in 1 Guilds!
12/04 08:04:42 | ExType: JsonSerializationException