Solved
I was working with the configurations of the email template but when i have tried that i was getting the error in the process model

rule!CRP_getUserOrGroupEmailIds(
recipient: if(
contains(
cons!CRP_TXT_BUTTON_ACTION_FOR_RM_APPROVAL[4],
pv!buttonAction
),
ac!involvedUsers,
if(
contains(
cons!CRP_TXT_BUTTON_ACTION_FOR_RM_APPROVAL[5],
pv!buttonAction
),
pv!requestMasterDetails['recordType!{7d4ba6cb-2d10-4167-b775-b01207e73ffb}CRP_requestMasterDetails.fields.{11a8daca-73c1-434d-b842-1d9095c26c07}initiatedBy'],
pv!taskAssignee,
)
)
)