Large latency in Cubase project

Hi! I changed my PC. When i create new project, everything is OK.
But when I open a template that I copied from my old computer, it has a very large delay, it is impossible to play. Although Latency in Studio Setup is exactly the same

Check the “Constrain delay Compensation” switch. Maybe it’s on?

You mean you experience a large latency when playing a software instrument via a MIDI keyboard? That is most likely because one (or more) plugin with high latency is somewhere in the signal path, on a group, the master or even the control room.
Activating “Constrain delay compensation” actually disables all plugins with a latency higher than x milliseconds (configurable in the settings) and is the easiest way to be able to play a VSTi when already having high latency plugins in the project.