The qUnlock S1 server is down and credits are not being issued.
Receive your unique login credentials via email or the service dashboard. Troubleshooting Login Issues qunlocktool username and password
To obtain a qUnlock Tool username and password, you must typically purchase credits or an activation from a third-party reseller or official service provider. This tool is frequently used for Sony Xperia devices to unlock networks or change bootloader status. Sailfish OS Forum How to Get Credentials Official Sources : Visit the official site at q-unlocker.com The qUnlock S1 server is down and credits
Register an account on the tool's official website or through a reseller. qunlocktool username and password
Purchase a license or credit (prices often range around $19 USD for basic access).