Error occurred in sliding window aggregation

# Describe the bug
**Error occurred in the situation where we specify the window size and sliding step size and at the same time we use operation in aggregation function.**


**Statements enclosed in red boxes will report the error.**

The report provides no file, test, entry point, or textual error details; it only points to two screenshots. Start by reproducing the sliding-window aggregation case with a specified window size, sliding step, and aggregation operation, then identify the failing component from the reported error. Done means the case no longer reports the shown error and has a regression test.

Written by the indexing model from the issue text.