Cannot create a stack from template: ajax error 401

Hi,

when I try to create a stack in AWS console, I get an ajax error 401 and the page quickly reloads. I have tried multiple different template files, also basic examples from AWS guides, but it doesn't work.

In my browser console I can already see an error 401 when I upload the file, although nothing is displayed in the interface.

I'm using my root user.

Here is a screencast: https://mega.nz/file/Bld2FBoK#NSrCoxbVhydwJ_5lu2RQMTS57Gv_ppzfIpMvgANIgDo

How can this happen?

Edited by: Sinbalta on Dec 23, 2020 6:44 AM