Hello @Calo85 ,

According to Google Translate, your question is that after resetting your range extender, your password is being rejected. If there is any discrepancy, please describe it in English

Here are some steps depending on which password is being refused:

Scenario 1: Login password to manage the extender is rejected
1. Try the default login password, which is often "admin".
2. Since you've just performed a hard reset, the extender should be back to factory default settings. Make sure your phone or PC is connected to the extender's Wi-Fi (not your router's), then try accessing http://tplinkrepeater.net or 192.168.0.254.
3. If it's your first time signing in after the reset, the extender may prompt you to create a new password — this is normal behavior.

Scenario 2: Wi-Fi password for the extender is rejected
1. After a reset, the extender needs to be reconfigured. Once set up, the extender's Wi-Fi password will be the same as your router's Wi-Fi password.
2. Open the Tether App and follow the instructions to set it up again: How to configure OneMesh Range Extender via Tether app
3. If your router's Wi-Fi password still doesn't work after reconfiguring, try performing the hard reset again and reconfigure via the Tether app.