We are so sorry that it took us this long to respond to your request! We truly appreciate your patience and efforts here 
I wanted to check in and ask how everything was going after you completed a reset? Is everything back to normal now?
If not, so we can better assist you, please provide a brief description of your current setup using this link as a guide.
Make sure to describe your network configuration/topology, including any networking hardware currently in use, so we can have a clear understanding of how your devices are communicating.
Additionally, could you please share a screenshot of the page where you are receiving this error so that we can better understand the issue you’re experiencing? (The screen where you say "you can’t restart it with the application running in circles without finding the Core).
Thanks so much!