Trouble with Just flight PA-28 EFB chart intergration

Hope this is the right place to post this problem. I am having trouble with activating navigraph in the EFB. I open navigraph code web browser and enter code, navigraph page will load in EFB. But shortly after that it will go away and a popup says token expired. Not sure what is going on thanks.

Tried it again and now it is working. Just had a update for navigraph and simlink, not sure if this is whay fixed it. But is working now thanks.