How to use Class Support with Windows 10 PC and IE 11
It might be unavailable to use Class Support with the PC
(Windows 10 and Internet Explorer 11) after April, 2018.
Please try other browsers (Firefox, Chrome etc.) if you
still have trouble after cache and cookies clear.
[ref.]
How To Clear the Browser's Cache and Other Records
Last-Modified: April 17, 2018
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