The ArcGIS Roads and Highways 10.8.1 patch 2 is now available for download.
You can access the patch and related information at https://support.esri.com/en/Products/Enterprise/arcgis-server/ArcGIS-Server/10-8-1#downloads?id=7941
Thanks for posting this. We had migrated our app and database servers from 10.7.1 to 10.8.1 and I was unable to add an external event in the 10.8.1 ALRS. I would get the following error: Save ALRS- Error: Notifications - Version name not valid. After installing this patch, it worked. THANKS!