ERR_CONNECTION_REFUSED and Change of UoM

Hello Members, I have two major issues that are hindering me from moving on well with my first deployment project, Issue 1: ERPNEXT with Healthcare Domain and other apps running on GCP. However, the services run smoothly but times out at an unexpected time that I can not predict or follow the trend. My attempt to resolve the issue was to upgrade the GCP RAM from 4GB to 8GB but still, the same outages happen Error is " This site can’t be reached, ERR_CONNECTION_REFUSED. Issue 2: Is there a way to change the unit of measure for items that have already been created with different UoM eg. from Pcs to Nos? Any support will be highly appreciated.