Unable to get metric data due to ValidationError in yace exporter

[pooja chauhan]

I'm getting following error in yace logs and then yace is not showing any metrics. Can you please help me to solve this issue?
YACE version which i'm using: v0.27.0-alpha

{"level":"warning","msg":"Unable to get metric data due to ValidationError: The value None for parameter MetricDataQueries.member.223.MetricStat.Stat is not a valid statistic.\nThe value None for parameter MetricDataQueries.member.224.MetricStat.Stat is not a valid statistic.\nThe value None for parameter MetricDataQueries.member.225.MetricStat.Stat is not a valid statistic.\nThe value None for parameter MetricDataQueries.member.226.MetricStat.Stat is not a valid statistic.\nThe value None for parameter MetricDataQueries.member.227.MetricStat.Stat is not a valid statistic.\nThe value None for parameter MetricDataQueries.member.228.MetricStat.Stat is not a valid statistic.\nThe value None for parameter MetricDataQueries.member.229.MetricStat.Stat is not a valid statistic.\nThe value None for parameter MetricDataQueries.member.230.MetricStat.Stat is not a valid statistic.\nThe value None for parameter MetricDataQueries.member.231.MetricStat.Stat is not a valid statistic.\nThe value None for parameter MetricDataQueries.member.232.MetricStat.Stat is not a valid statistic.\nThe value None for parameter MetricDataQueries.member.233.MetricStat.Stat is not a valid statistic.\nThe value None for parameter MetricDataQueries.member.234.MetricStat.Stat is not a valid statistic.\nThe value None for parameter MetricDataQueries.member.235.MetricStat.Stat is not a valid statistic.\nThe value None for parameter MetricDataQueries.member.236.MetricStat.Stat is not a valid statistic.\nThe value None for parameter MetricDataQueries.member.237.MetricStat.Stat is not a valid statistic.\nThe value None for parameter MetricDataQueries.member.238.MetricStat.Stat is not a valid statistic.\nThe value None for parameter MetricDataQueries.member.239.MetricStat.Stat is not a valid statistic.\nThe value None for parameter MetricDataQueries.member.240.MetricStat.Stat is not a valid statistic.\nThe value None for parameter MetricDataQueries.member.241.MetricStat.Stat is not a valid statistic.\nThe value None for parameter MetricDataQueries.member.242.MetricStat.Stat is not a valid statistic.\nThe value None for parameter MetricDataQueries.member.243.MetricStat.Stat is not a valid statistic.\nThe value None for parameter MetricDataQueries.member.244.MetricStat.Stat is not a valid statistic.\nThe value None for parameter MetricDataQueries.member.245.MetricStat.Stat is not a valid statistic.\nThe value None for parameter MetricDataQueries.member.246.MetricStat.Stat is not a valid statistic.\nThe value None for parameter MetricDataQueries.member.247.MetricStat.Stat is not a valid statistic.\nThe value None for parameter MetricDataQueries.member.248.MetricStat.Stat is not a valid statistic.\nThe value None for parameter MetricDataQueries.member.249.MetricStat.Stat is not a valid statistic.\nThe value None for parameter MetricDataQueries.member.250.MetricStat.Stat is not a valid statistic.\nThe value None for parameter MetricDataQueries.member.251.MetricStat.Stat is not a valid statistic.\nThe value None for parameter MetricDataQueries.member.252.MetricStat.Stat is not a valid statistic.\nThe value None for parameter MetricDataQueries.member.253.MetricStat.Stat is not a valid statistic.\nThe value None for parameter MetricDataQueries.member.254.MetricStat.Stat is not a valid statistic.\nThe value None for parameter MetricDataQueries.member.255.MetricStat.Stat is not a valid statistic.\nThe value None for parameter MetricDataQueries.member.256.MetricStat.Stat is not a valid statistic.\nThe value None for parameter MetricDataQueries.member.257.MetricStat.Stat is not a valid statistic.\nThe value None for parameter MetricDataQueries.member.258.MetricStat.Stat is not a valid statistic.\nThe value None for parameter MetricDataQueries.member.259.MetricStat.Stat is not a valid statistic.\nThe value None for parameter MetricDataQueries.member.260.MetricStat.Stat is not a valid statistic.\nThe value None for parameter MetricDataQueries.member.261.MetricStat.Stat is not a valid statistic.\nThe value None for parameter MetricDataQueries.member.262.MetricStat.Stat is not a valid statistic.\nThe value None for parameter MetricDataQueries.member.263.MetricStat.Stat is not a valid statistic.\nThe value None for parameter MetricDataQueries.member.264.MetricStat.Stat is not a valid statistic.\nThe value None for parameter MetricDataQueries.member.265.MetricStat.Stat is not a valid statistic.\nThe value None for parameter MetricDataQueries.member.266.MetricStat.Stat is not a valid statistic.\nThe value None for parameter MetricDataQueries.member.267.MetricStat.Stat is not a valid statistic.\nThe value None for parameter MetricDataQueries.member.268.MetricStat.Stat is not a valid statistic.\nThe value None for parameter MetricDataQueries.member.269.MetricStat.Stat is not a valid statistic.\nThe value None for parameter MetricDataQueries.member.270.MetricStat.Stat is not a valid statistic.\nThe value None for parameter MetricDataQueries.member.271.MetricStat.Stat is not a valid statistic.\nThe value None for parameter MetricDataQueries.member.272.MetricStat.Stat is not a valid statistic.\nThe value None for parameter MetricDataQueries.member.273.MetricStat.Stat is not a valid statistic.\nThe value None for parameter MetricDataQueries.member.274.MetricStat.Stat is not a valid statistic.\nThe value None for parameter MetricDataQueries.member.275.MetricStat.Stat is not a valid statistic.\nThe value None for parameter MetricDataQueries.member.276.MetricStat.Stat is not a valid statistic.\nThe value None for parameter MetricDataQueries.member.277.MetricStat.Stat is not a valid statistic.\nThe value None for parameter MetricDataQueries.member.278.MetricStat.Stat is not a valid statistic.\nThe value None for parameter MetricDataQueries.member.279.MetricStat.Stat is not a valid statistic.\nThe value None for parameter MetricDataQueries.member.280.MetricStat.Stat is not a valid statistic.\nThe value None for parameter MetricDataQueries.member.281.MetricStat.Stat is not a valid statistic.\nThe value None for parameter MetricDataQueries.member.282.MetricStat.Stat is not a valid statistic.\nThe value None for parameter MetricDataQueries.member.283.MetricStat.Stat is not a valid statistic.\n\n\tstatus code: 400, request id: 98506647-c516-4c93-a1cf-9e6bc4374f29","time":"2021-05-20T19:05:08Z"}

Please help.

Thanks
Pooja