Hi Balu,
from the instance monitor log it seems that 2nd stage is missing or does not have Agent ID assigned, - The 1st stage brings the approver according to Agent rule id: GRAC_MSMP_REQUESTOR_AGENT. after that the request does not find the next stage.
- So check your 2nd stage as well Sl. no. of stages: 001, then 002 or 010 then 020
Please provide your stage screenshot, with details(agent rule ids)