GUI was unable to connect to the Ruby server

[MGDLF]

Sorry, Sonic Pi is having issues booting:
GUI was unable to connect to the Ruby server.
Please consider reporting a bug at

System Information
Sonic Pi version: 4.6.0
OS: macOS Sequoia (15.7)
CPU: x86_64

[GUI] - initialising documentation window
[API] [INFO ] : Waiting Until Ready... 59
...
[API] [INFO ] : Waiting Until Ready... 0
[GUI] - Critical Error. Unable to connect to server..

[MGDLF]

Tried solution proposed in https://github.com/sonic-pi-net/sonic-pi/issues/3479 but got the following error when entering "brew install gmp"

"zsh: command not found: brew"