I have read other answer regarding the same problem but still, it doesn't change anything at all, I still get the error...
I'm trying to save the details in the form to salesforce but it says
"Formula Expression is required on the action attributes. "
when I tried saving it.
<apex:pageBlock > <apex:pageBlockButtons > <apex:commandButton value="Save" action="!save"/> <apex:commandButton value="Cancel" action="!cancel"/> </apex:pageBlockButtons> </apex:pageBlock >