Standalone Kernel No input available

I have encountered the same problem as the thread attached. Mathematica stuck in "running" for every calculation I attempt, kernel error

However, when I try to launch a standalone kernel through Terminal (macOS), there is no input line available to evaluate the code given in the solution to the thread.

I have attempted a full re-download and reinstallation of Mathematica, but both problems persist. What else can I try to fix the issue?