Okay i fond the solution.
By default DMARC record look likes v=DMARC1; p=none
but, we need to change this to p=quarantine or p=Reject
to do that you can use
https://dmarcian.com/dmarc-record-wizard/ website
also, when adding this _dmarc record to dns, first open it in admin panel (main admin panel) and navigate to _dmarc record line.
then change the record Text after TXT
make sure you needs to add this record in double quotation like this
"v=DMARC1; p=quarantine; rua=mailto:example@domain.com; ruf=mailto:example@domain.com"
in my case, i try without the double quotation. Thats why i get that error in mxtoolbox