Intermittently cant connect to VPN from Laptop, but always works from iPhone
Why don't you upgrade to the latest version.
Did you try turning off your wifi on Mac and turning it on again? After that try connecting one by one. You will find which one is causing the issue. Try killing them as well.
Try restarting your machine if 1 and 2 don't work.
Worst case, remove all the configurations, add one by one and observe over a period of time.