I can't manually add the flag because the field is not there.

Manually adding it doesn't work either.
Typing: &serverTimezone=UTC behind the database name wont work either.
The link ends up as: &serverTimezone=UTC?allowReconnect=true&autoReconnect=true

I am using version: 3.4-beta-3-774

You need to add them behind the last entry, not in front, can you send the MySQL flags snippet?

I can't put it behind it because there is no field for flags, they get automatically added but they don't include serverTimezone

https://github.com/webbukkit/dynmap/blob/v3.0/spigot/src/main/resources/configuration.txt#L42 somehow they got removed on your file

Ty, this fixed it for me!