A container needs to sit in the position designed for the model. Partial insertion can produce an unexpected warning or prevent the normal collection arrangement from working.
Understanding this situation
Check the user instructions and avoid forcing a tank that catches or appears distorted. A correctly emptied container is not necessarily correctly refitted, so both steps deserve attention.
A useful next step
Refit only as directed with the appliance safe. If it will not seat normally or a warning continues, seek model-specific help. Do not wedge the tank in place, defeat a switch or keep running while water collection is uncertain.
Manuals and supporting guidance
Model-specific instructions take priority. These references support the practical principles discussed here; they do not diagnose your appliance.