ethClient "NOT_AVAILABLE"

[vikipedia48]

I can successfully connect to a Hyperledger Besu network, but health checks keep failing every 5 seconds.

This is the /api/actuator/health response:
{"status":"UP","components":{"discoveryComposite":{"description":"Discovery Client not initialized","status":"UNKNOWN","components":{"discoveryClient":{"description":"Discovery Client not initialized","status":"UNKNOWN"}}},"ethClient":{"status":"NOT_AVAILABLE","details":{"error":"java.lang.IllegalArgumentException: Value must not be null"}},"mongo":{"status":"UP","details":{"latestIndexedBlock":84892}},"node":{"status":"UP","details":{"projectVersion":"3.3.10","nodeEndpoint":"http://172.20.76.6:31311"}},"ping":{"status":"UP"},"redis":{"status":"UP","details":{"version":"7.2.4"}},"refreshScope":{"status":"UP"}}}

While I'm fairly certain the problem is on my side, how does Chainlens get the ethClient field, whose nullness produces the error? How would I set it on my network so that the health check returns a valid response?