N1QL error. Usually out of memory

[vsr1]

This is straight forward there might be some setup issue . Why do you use back-ticks in fromString.
Check 8093 port is open

https://docs.couchbase.com/nodejs-sdk/current/n1ql-queries-with-sdk.html#placeholders

Error: An unknown N1QL error occured. This is usually related to an out-of-memory condition

update: it happens only when enforcing consistency levels using REQUEST_PLUS or STATEMENT_PLUS