alankky Hello, please go to our website to download the latest Windows client 1.0.0(beta-2) and see if it works.

You can also follow this FAQ to turn off firewall, VPN and antivirus softwares on your PC and disable AP isolation of your router to see if it helps.

Thanks but i instead downgraded the quest 2 version to 1.0.5 for solving this, I have tried Windows client and noted that it's highly unusable due to missing function (i.e. clear invalid files not working as previously it could detect the non-existed files as a whole automatically for single click whilst in current version I need to do it for each thumbnail which is very inconvenient and time-consuming to check as I have more than 3,500 files located in different PCs and folders). Thus, I will stick to 0.2.4

LeSign
Hello, we're aware of this issue and will refine the "Clear invalid files" function in the next update.