"There was an error loading the contact"
I became very frustrated as it became impossible for me to manage my 2500+ contact list. After some research on Internet I found a relatively simple solution.
In Chrome browser
1) select "Clear Browsing Data..."
2) and select "Empty the cache" from "the beginning of time"
Unfortunately, this did not fix the error entirely and I still get it. I hope Google fixes this problem soon. In the meanwhile I exported my contacts and imported them into Apple "Address Book" for management and safekeeping. Any suggestions?