undefined: validator

undefined: validator

cannot use (*meter)(nil) (value of type *meter) as "go.opentelemetry.io/otel/metric".Meter value in variable declaration: *meter does not implement "go.opentelemetry.io/otel/metric".Meter (missing method Float64Gauge)

cannot use mp.meters.Lookup(s, func() *meter {…}) (value of type *meter) as "go.opentelemetry.io/otel/metric".Meter value in return statement: *meter does not implement "go.opentelemetry.io/otel/metric".Meter (missing method Float64Gauge)