@kimounkisa Hi, it is still an issue lately. With my friends what we found to be working is the following:
- close FAF client completely
- change default browser (usually we use Firefox by default, and it seems to be causing the problem) to i.e. Edge
- delete the client.prefs file from C:\Users\yourName\AppData\Roaming\Forged Alliance Forever
- start FAF client, click on logon, and this time it should send you to your new default browser to logon with your FAF account.
Hope it works for others too.