When using Quickmap Search (Find Tool) from the Find menu, you may get the following error:

Quickmap: Unexpected Error Encountered

Index was out of range. Must be non-negative and less than the size of the collection.
Parameter name: index.

This can occur if the search window is too small to display search results to select from. This can be because the window needs to be resized or due to Windows display settings, such as font size, DPI Scaling, resolution, etc.

After resizing the search window (by dragging on the bottom right corner of the window) to make it larger, restart Quickmap. If that doesn’t work, you may need to adjust the above settings on your computer, then restart Quickmap to fix the Index out of range error.