How can I fix this?
Here is system logs.
Jun 15 10:03:26 Siams-MacBook-Pro DTServiceHub[11482]: DTServiceHub[11482]: [error] 'mach_msg_send' failed: (ipc/send) invalid destination port (268435459)
Jun 15 10:03:36 Siams-MacBook-Pro Xcode[10188]: +[DTServiceHubClient localConnectionWithAuthorization:returningServerPid:]: failed to establish connection with DTServiceHub service '/Applications/Xcode.app/Contents/SharedFrameworks/DVTInstrumentsFoundation.framework/Resources/DTServiceHub'
Jun 15 10:03:36 Siams-MacBook-Pro Xcode[10188]: Xcode[10188]: [error] 'mach_msg_send' failed: (ipc/send) invalid destination port (268435459)