System Error while login

[rohanb]

Dear Service provider,

We are using paypal sandbox(testing) in our application ,

it was working fine earlier but from Saturday its  not allowing to login and showing a System Error " client_auth_mech_not_allowed"

kindly check this and please provied us the solution

[khanhvanvo]

Now, I am also having this problem. I don't know when this issue will be resolved

[Saneen]

pls solve this

[diwmpq15]

is this issue be resolved, my app be the same.