Too Many Requests; error code: 429 against the Schema Registry

Upgrade to the latest version of the Helm chart as set
If you see too many requests against a Schema Registry upgrade to 5.5.7 and set the following in lenses.conf

lenses.schema.registry.client.http.rate.type= "sliding" 
lenses.schema.registry.client.http.rate.maxRequests= 200
lenses.schema.registry.client.http.rate.window= "2 seconds"

you can additionally set the same for Connect clusters.

|lenses.connect.client.http.retry
|lenses.connect.client.http.maxRetryAwait
|lenses.connect.client.http.maxRetryCount