If I log in as accountant Role, I can save a transaction but when accountant logs in with the same role, she gets permission violation error, what am I missing here?

If the user can access the create transaction form, there's probably some customization that affect some record that the user doesn't have access to. Check script logs Disable all scripts and workflows on the record and let them try again.

hmm but i logged in with the same role and was able to do the transaction

I would check the Global Permissions on both Employee records (Access tab)

we don't have global permission enabled

If you see "Notice (SuiteScript): Permission violation" then it's a script doing it

hmm thanks yes it does say notice (Suitescript), but this is caused by NetSuite bundle and i gave all the permission mentioned in SuiteAnswer for this bundle

Why it works for you is maybe because you installed the bundle and therefore is the owner of the record.

message has been deleted

Look at the "scripted records"-page

no new things since i installed the bundle on workflow or the script on the scripted record

So there's nothing deployed on credit memos?

nothing

Hmm, how can you get a suitescript error if no workflows, no ue-script, no client scripts form level scripts are deployed... I'm stumped. Perhaps script that are deployed on a subrecord to credit memos?

this bundle has two scripts but they are locked and not deployed, there are plug-ins though.