Authentification failed to access to the shop for pluggin - by: LEADER

Hi,

I need the last version of KANBAN (v4.1) since the last version of Projeqtor. But, Authentification system not accept to log in. Is there an issue ?

Can you help me quickly because i need to update my plugin or downgrade Projeqtor version under 8.1

Thank you in advance for your help