Hello Zara,
Yes, I can fixed. Go to SICF transaction, you make double click over service (webdynpro), so click in “Logon Data” flange, and then write user and password (remember this user must be created before in su01 transaction), I recommend you, create service´s user.
Later save, and problem is resolved.
Check pic.
I hope this instructions can help you.
Best regards.