I recently upgraded to new beta version of macOS 10.14 but after installing it when I tried to open my older version of Xcode 8.3.2, every time it gets crashed. Below is its
As discussed in a few places like here and here, Xcode 8 does not run on Mojave. The best approach at this point is to either migrate your application to run with the latest Xcode, or run a VM with High Sierra or earlier that still supports your required version of Xcode.