Dropbox token not working on some PC

I use RaiDrive free on several PC, old and new. Everything works fine with Dropbox, Google photo and my synology. But on 2 PCs, a Win10 laptop and my new Win11 tower, every single time I reboot I have to login in my Dropbox account. It seems the token is not working. Old PCs keeps working fine.
Any help appreciated.

Hi~ @drono74 ,

A log file is required to check the exact condition.
If you send us the log file(C:\ProgramData\OpenBoxLab\RaiDrive\log) via e-mail(support@raidrive.com), we will check it again and let you know.