I'm doing the event currently, and two of my pets (Zinc and Sunflower) aren't leveling. They are level 60 and the level up bar is all purple and says 100% but neither of them are leveling.

You currently reached the level cap! We have to wait for new level cap update to be implemented! XD

That was what I was afraid someone would say...

Don't worry~ We're all on the same ship here!

The "SS We Reached Level Cap"

We usually get the new level cap with a new area though, so it's might take awhile. You may want to start saving gold, because new area = new equips! OuO

Well, thanks anyway for your help. I'll be sure to start saving up.

On a side note: does this mean I won't be able to beat the Dungeon Boss in Umbra Forest? Because I'm getting my butt kicked right now with my maxed out party.

Well, you can... But you may need to allocate specific stats and proficiency in order to beat the dungeon... Even with maxed out pets and super gears, the final boss still can wipe you out! The boss also had patterns and tricks you might want to watch out for!

There are a few guides that might help you too! Like this one by Dimitri! There are also a few guides by other players scattered in this forum! XDD

But if you're still stuck I can tell you my build! Though it's a bit tricky to play and VERY potion/elixir consuming! Just PM me if you need it not here! Since we are talking in the Bug Reporting section! Which is inappropriate! XDDD