Error Values displayed in PpPpk Chart

Hi, in below Dashboard, error value was displayed in in Pp Chart (upper chart) whilst the Ppk Chart (lower chart) able to display without any error value.

In order to let the Pp Chart to display normally, I force to do date filter under "Filter on this visual" else the whole chart will be displayed with error value. With this, I'm not able to view other months trend.

I've tried to duplicate a Ppk Chart and replace with Pp value but error value is displaying.

Please advice on how to get this issue solve.

Thanks.

Regards,

LC