Same thing just happened to me. Try contacting Rob (zygote2k).
I ended up repairing it myself. Is your tank full or empty? Mine was empty. First contact the tank manufacturer to see if they sell replacement trims (you may have to order it through a LFS). Mine was a AGA/Aqueon and they said they stopped selling replacements. I was able to buy one from here:
http://www.aquariumframeswholesale.com
When the trim came in, I got a hacksaw blade and cut out all the old trim (make sure your tank is halfway empty), 4-6 inches at a time, (it's tedious, but any more than that you risk cracking your glass when pulling off the trim) and then cleaned off all the silicone. I followed this video: https://m.youtube.com/watch?v=rAJfaSEUp58
Put silicone on the new trim and put it on with something heavy on top of it to hold it down while the silicone cures (24 hours).
If your tank is not empty, it will be difficult because when cutting the trim, all that plastic debris will fall into the tank. If the tank is not empty, I would try something like this: https://reefbuilders.com/2014/03/19/stupid-plastic-center-brace/