Query Services error

Having issue with my query services, can’t get any values from N1ql and .net client

Here’s some errors shows in the Query.logs

2020-04-03T06:45:38.146+07:00 [Warn] servicesChangeNotifier: Connection terminated for pool notifier instance of http://%40cbq-engine-cbauth@127.0.0.1:8091, default (read tcp 127.0.0.1:61494->127.0.0.1:8091: wsarecv: An existing connection was forcibly closed by the remote host.)
2020/04/03 06:45:38 revrpc: Got error (EOF) and will retry in 1s
2020-04-03T06:45:38.151+07:00 [Warn] servicesChangeNotifier: Connection terminated for services notifier instance of http://%40cbq-engine-cbauth@127.0.0.1:8091, default (read tcp 127.0.0.1:61490->127.0.0.1:8091: wsarecv: An existing connection was forcibly closed by the remote host.)
2020-04-03T06:45:38.156+07:00 [ERROR] Bucket Updater exited with err CBAuth database is stale: last reason: EOF
2020-04-03T06:45:39.145+07:00 [Error] common.ClusterAuthUrl(): CBAuth database is stale: last reason: EOF
2020-04-03T06:45:39.148+07:00 [Error] ClientSettings: metakv notifier failed (read tcp 127.0.0.1:61044->127.0.0.1:8091: wsarecv: An existing connection was forcibly closed by the remote host.)…Restarting 1

Would appreciate some can advice on the issue im getting here. Currently using Couchbase Server Community Edition 5.1.1 build 5723.

Below are the log message from couchbase web:

Client-side error-report for user undefined on node ‘ns_1@10.135.0.75’:
User-Agent:Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/80.0.3987.149 Safari/537.36
Error retrieving list of buckets, contacting query service returned status: 504