Hello @Edz27z ,

Welcome to our community.

According to Google Translate, your question is about resetting the password on your TL-PA9020P powerline adapter kit, but the network is still showing as password-protected with a padlock icon. If there is any discrepancy, please describe it in English.

To properly reset your powerline device and restore it to factory default settings (which will reset the password), please follow these steps:

For the TL-PA9020P powerline adapter:
Press and hold the pair button for more than 6-15 seconds. This will reset the device back to default settings.
After resetting, the device will revert to its default wireless name and password, which can be found on the product label/sticker on the device itself.

For detailed instructions on accessing the web interface, you can refer to this FAQ: How to customize Powerline ac Extender's wireless settings via web-based management interface

Note: After performing the reset, you may need to refresh the Wi-Fi network list on your device (phone/laptop) to see the updated network settings. Sometimes devices cache the old network information, so forgetting the network and reconnecting can help.