A user-removable tank or seal may not have been refitted exactly as specified. The timing makes the seating worth checking through the normal owner procedure.
What the observation tells you
A part that appears close to position may still leave a connection misaligned. Forcing the reservoir downward or adding sealant can damage it and obscure the original issue. A crack or damaged seal needs separate assessment.
A useful next step
Empty and refit permitted components according to the model instructions, protecting the surrounding area from spills. If dripping continues, stop using the dispenser and identify the tank and connection for advice.
Manuals and supporting guidance
Model-specific instructions take priority. These references support the practical principles discussed here; they do not diagnose your appliance.