400 Bad Request when installing Hikashop 1.5.7

I tried to install HikaShop 1.5.7 on top of 1.5.6 that was already installed and I got this error
Bad Request

Your browser sent a request that this server could not understand.
Apache/2.2.3 (CloudLinux) Server at 01net.cloudaccess.net Port 80

I thought the existing version is posing problems and uninstalled all Hikashop modules from Installer>Manage installments and tried to instal the latest version again and got the error once again. Am I missing something? Is there something else from Hikashop (plugin etc) that needs to be ininstalled before I could instal Hikashop latest version?

Hi,

That's not a problem with HikaShop. It's apparently a problem with your browser cookies:
anything-digital.com/forum/extension/sh4...ror-bad-request.html
So try to clean them and reinstall.