Resolved immediate application shutdown when clicking on layer symbols following Windows cumulative updates.
Esri documented the problem as and quickly determined that the only long‑term solution was to upgrade to ArcGIS Pro 3.0.x (which uses .NET 6 and is not affected by the issue). However, for organizations that were not yet ready to make the major jump to version 3.x, Esri released a targeted fix: ArcGIS Pro 2.9 Patch 5 (build 2.9.5, also referred to as “2.9.5.295” or “295”). arcgis pro 29 patch 5 295 link
Click on the tab, then select the Downloads sub-tab. or 4 first.
Before installing, note that on your computer. Patches are cumulative, meaning you can jump directly from a base 2.9 setup straight to 2.9.5 without installing patches 1, 2, 3, or 4 first. arcgis pro 29 patch 5 295 link