Approval of purchase requisition failed. Contact admin. Message no. MMPUR_PR_WFL_COMMON008

Hello everyone 

I person an contented portion trying to person PR to PO , PR has been released but the staus of the papers inactive 03 successful merchandise and erstwhile one checked workflow presumption app  for wide merchandise of acquisition requisition one recovered 3 errors

1- 

Approval of acquisition requisition failed. Contact admin.

Message no. MMPUR_PR_WFL_COMMON008
2- 

Authorization missing for <POrg> ; interaction administrator

Message no. MMPUR_REQ_COMMON097
3- 

An objection was raised

Message no. SY530

but one checked different PR with the aforesaid criteria but it has a staus released completed and already converted to po without immoderate problem
can anyone explicate however to lick this issue 
thanks