As suggested by Mr Samuli follow the note 1617090.
Solution:
Activate or deactivate the logon cookie
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You can configure whether the logon cookie is to be used and you can activate or
deactivate it in the service settings. The default value depends on your release. The
configuration switch is provided in transaction SICF. To access it, double-click a service
to call the service settings and choose the "Error Pages" tab. On the "Logon Errors" tab
page, choose the "Configuration" pushbutton for the system logon. In the system logon
settings, set the "Deactivate Login XSRF Protection" indicator accordingly.
Image may be NSFW.
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-Satya
