Hi there!
Thank you for reaching out to us!
This sounds like a conflict because I couldn’t reproduce the JavaScript errors in my own WordPress install while having all Modern Tribe plugins and Twenty Seventeen theme enabled.
As I can see from your System Info you are running Community Events version 4.5.5. Could you please update it to version 4.5.6 and see how it goes?
If the plugin update doesn’t help you to solve your problem, I would suggest you to run a Conflicts Test.
You can start the test by temporarily deactivating all of your plugins (except Modern Tribe plugins) and changing your theme to another one like Twenty Seventeen and let us know if the issue persists after that.
I hope this helps you get started! Let me know if you have any other questions and I’ll be happy to assist!
Best Regards,
Patricia