Unable to connect any app

I’m unable to connect any app in my scenario. i have tried different apps like mailchimp, google sheets. Also i have tried creating new accounts and using other Browsers and devices but the problem continues. It’s showing bad request message with code SC400… Please help me.

Hi @Sushant
Can you try it from a desktop browser or use chrome? it should solve the issue. Brave supposedly blocks cookies and may interrupt authentication.