\textcolor{pink}{\huge \textsf{WELCOME! ^-^}}
Take the time to check out the FAQ and GUIDE if you haven’t already.
There’s also a lot of good stuff on the forum to help you, like:
The Ultimate Guide for WK
The Ultimate Additional Japanese Resources List!
The New And Improved List Of API and Third Party Apps
I hope your Japanese learning journey goes well and that you enjoy your time with us on the forums.
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I previously answered this question in this thread:
You can get support for WKstats in the thread [STATS] Statistics site
Essentially though, you should go to your API Key page, click Generate a New Token and then click Generate Token at the bottom of that page (without ticking any off the boxes) then copy the newly created code and go to wkstats.com, click Login at the top right and paste that code exactly as it appears into the box.
It should then give you your stats.
If this doesn’t work, I’d double check there isn’t a space before or after your API key when you paste it and if there isn’t, I’d try clearing your cache if you’d used wkstats before the V1 site changed over the V2 one.
You can find instructions for various browsers here: www.refreshyourcache.com