I experience the same sign in problem recently and I find some possible issues:
All the users above mentioned that they have signed in the Chart App before and could not login the App after a while. So I think there are problems with the authentication process.
Just my wild guess:
- There might be some login information stored on local machine which automatically signed you in without a new authentication process(accessing the identity.api.navigraph.com), but the file is broken when you required to signed in after a long period of time.
- I actually trace the Chart App internet access record and I found that Chart App access identity.api.navigraph.com without opening a tab in Chrome. So the problem might be Chrome does not give authentication information back to the App.
- There might be some anti-virus software preventing Chart App from opening a tab in Chrome.
Hopefully, the technical team could locate the real problem and fix it!