I was evaluating SharePoint 2019, so i prepared only one VM which got (SQL Server, SharePoint, Active Directory).
When i tried to run the SharePoint sites, it seems that it stuck somewhere and loading forever. I checked IIS, all the app pool and sites are in running mode.
So i tried to run SharePoint Product Configuration wizard, and it throws the following error “Only one copy of the sharepoint products configuration wizard can be run at a time”
So when i looked into the services.msc, i found out that SQL Server Instance wasn’t running.
Once i kicked this service on, SharePoint started to run normally.