There has been some issues relating to standard users within Zoho CRM accessing Zoho finance with out giving that user administrative privileges'. There are two possibilities.
1st Option: Create a new profile by cloning the administrator profile and modifying the new profile by taking out unwanted privileges'.
2nd Option; Login as Admin User in Zoho CRM -> Setup -> Customization -> Modules
and Fields -> Zoho Finance, Click on ellipses (...) near the Module name
-> Module Permission -> add the User Profiles who need access to the
module and save it.
This should enable standard CRM users to access Zoho finance w/o administrator privileges