Because Tutorial Island is probably the most aggressive banning task in the entire game, where all of my false bans have taken place when on the official client.
Download Java 8 if you don't have it already, and right click it, click open with, and choose Java, if Java not listed click the choose other app button and navigate to the Java folder.
Did you try the API method for it?
https://osbot.org/api/org/osbot/rs07/api/Client.AccountType.html
AccountType currentAccountType = getClient().getAccountType();
if (currentAccountType.equals(AccountType.NORMAL)) {
log("Account type is NORMAL");
}
//etc
Don't remember which equals is most conventional here, but either one should work I think
Probably using the wrong import. Check your imports and see if it's importing Java's area class or OSBot's.
OSBot's import
import org.osbot.rs07.api.map.Area;