I am using a custom button in classic to open the flow page with url /flow/runtime.apexp?flowDevName=Account_Handover&accountId={!Account.Id}
I need to get this accountId in my visual flow, so I have created accountId variable, if I don't enable the lightning skin from Process Automation Settings I get this account Id, but as soon as I enable the lightning skin in there (which I need to have in order to use custom lightning components in flow), I get the accountId as null.
Any suggestion/idea if I am missing something?