If you got the following message "Your Shadow is still booting, please wait." it means that your Shadow session booting sequence is still running so you need to wait until it is complete. The waiting time can be longer if you shutted down your Shadow in your previous use of it or if a Windows update is running.
If you installed a VPN, a proxy or an antivirus, they may be the reason you're not reaching your Shadow.
If this error is still here after a long time or if you installed one of the softs listed above, please contact the Shadow support through your customer area.