FCB::Open failed: Could not open file
You replaced master with the one that comes from the SQL Server build process. This one is pointing to the release build mkmaster folders for msdb database. As msdb is no a system database, you should be able to start the engine, connect to it, detach msdb and re-attach the correctly located one. But this is not the correct process. The correct process is described in Rebuild System Databases, and involves running setup.exe:

Setup /QUIET /ACTION=REBUILDDATABASE ...