Added null check

Author: jasonlessenich

src/main/java/net/javadiscord/javabot/systems/help/HelpExperienceService.java

@@ -107,6 +107,7 @@ private void checkExperienceRoles(Guild guild, HelpAccount account) {
 		guild.retrieveMemberById(account.getUserId()).queue(member ->
 				Bot.config.get(guild).getHelp().getExperienceRoles().forEach((key, value) -> {
 					Pair<Role, Double> role = account.getCurrentExperienceGoal(guild);
+					if (role.first() == null) return;
 					if (key.equals(role.first().getIdLong())) {
 						guild.addRoleToMember(member, role.first()).queue();
 					} else {