Aside from the first few days where the initial bedding moisture is getting evened out, a worm bin should not be producing leachate, aka the juice that drips out of the bottom. This produces an anaerobic vermicompost and a difficult harvest. It can also result in worms escaping out of the bottom of your bin in the first few days of operation.
The first thing to do is to open the zipper if it's not already. If you purchased your Bag in March 2021 or later, you should remove the fully detachable bottom. This will allow the leachate to empty out more freely. Ensure there is a container to catch the leachate if being used on a surface you do not want to get wet.
Secondly, keep in mind that food waste is typically 89-90% water content, so you have a lot of water bound up in the food waste you put in your Urban Worm Bag, even if it doesn't seem wet when you put it it. This water gets released when the cell walls decompose and eventually rupture. This water content needs to be offset with additions of dry bedding to help sop up that excess moisture.
As your bin is already dripping, I would mix dry bedding into the top of your vermicompost and refrain from feeding for a week.
Keep the bedding levels high with carbon-rich bedding sources like paper and cardboard and go easy on the food waste until the bottom stops leaking.