The ArcGIS Pro 2.3.1 patch is now available to download from My Esri and via the software update (if enabled).
Please apply this patch to get the fixes listed in Release notes for ArcGIS Pro 2.3—ArcGIS Pro | ArcGIS Desktop
Also, here is additional information about Minor Releases and Patches: Releases and patches—ArcGIS Pro | ArcGIS Desktop
