Expression evaluation error in rule 'appian_rule1' (called by another rule 'appian_rule2') at function a!queryRecordType: Cannot invoke "Object.getClass()" because "activeProcessCount" is null

Hi Team,

Could you please check and suggest a solution for below issue?

Expression evaluation error in rule 'appian_rule1' (called by another rule 'appian_rule2') at function a!queryRecordType: Cannot invoke "Object.getClass()" because "activeProcessCount" is null