Attempting to list markets either returns INVALID_APP_KEY Or SESSION error

[Krippers]

Hi I am trying to bring my python code into .NET and for some reason trying to get the markets list keeps alternating between
INVALID_SESSION_INFORMATION...

[bondmagic3]

Hi,

I have been getting this error lately when calling live ( non delayed ) betfair API. I dont know whats the issue, can someone please...