[Can't open project]

Thank you, this solved the problem!

[Can't open project]

Hello,

I have recently set up Plastic for my Unity project and it has worked fine for a few days, but suddenly Unity started hanging whenever I try to open it. When I open the PlasticSCM client it gives me the following error: 

Error converting value "invalid-invalid" to type 'PlasticGui.WebApi.Responses.SsoProvider+KnownType'. Path 'Providers[2].Type', line 1, position 147.

followed by an 'auth token expired' error message.
Any help would be appreciated.