How serious of a concern

I understand any leak isnt a good thing. While changing the oil yesterday there was a pan directly behind the oil plug case. It had the smallest drip coming from where it seems to be the gasket seal and the pan. It seems like a clear liquid and not red. I thought it was the tranny fluid. I circled it in the pic below. It’s not even a big enough of a leak that would fall on the ground. The plastic pan that covers it has the smallest wet spot. Is this an ASAP fix or can it wait a little bit?



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