Hi @io9k,
Definitely open a ticket with Support. I imagine they’ll ship you a replacement build platform. They’ll probably also get you to drain the tank (ideally through a paint strainer) and inspect it for any damage.
Unofficially, depending on the condition of your existing build platform it might be salvageable. I’ve taken them apart and put them back together before. Some users have even filled them with self-expanding foam or sealed them with silicone caulk to make them more robust and prevent resin seeping in through the cracks and back out later.
Rest assured what you encountered isn’t common (at least as far as I’ve seen).