JMEter Error% captured for /rest /api /cors /auth etc.

hi all,

I was running Appian JMeter but it seems that test cases like [123 /suite/rest/a/task/latest/168437443/form] was considered as Error and Error% display 100%

Was there any way to exclude these cases? My Ultimate goal is to capture real connection problems such as webAPI failure in Appian.