Release note v2.47.0.1:
- Enabled fast failure for cookie manipulation in IE. The refactor of cookie
handling for the IE driver introduces an incompatibility with the 64-bit IE
driver and IE 10 and 11 running on 64-bit Windows. As is the case with
sending keystrokes and creating screenshots, a Windows hook procedure is now
used for getting and settingcookies in IE. That means that in IE 10 and 11
on 64-bit Windows, where the content rendering process is still 32-bit, you
must use the 32-bit IEDriverServer.exe in order to manipulate cookies.
This commit will now cause exceptions to be thrown if you attempt to set
or get cookies using the 64-bit driver against a 32-bit version of IE (or
vice versa), but in particular, this will affect users who mistakenly try
to use the 64-bit executable with IE 10 or 11 in 64-bit Windows.
(https://raw.githubusercontent.com/SeleniumHQ/selenium/master/cpp/iedriverserver/CHANGELOG)
So you should use 32 bit or the content rendering needs to be changed to 64 bit