Today I've received my three TL-SG108PE, hardware version v5. First if downloaded the latest firmware "TL-SG108PE(UN) 5.0_20230218.zip" to bring all devices to it's latest firmware release.

To update the firmware I did the following:

- navigate to each of the corresponding Web interfaces
- hopped to "System > Firmware Upgrade"
- performing the necessary reboot of each switch to and
- uploaded the "TL-SG108PE(UN) 5.0_20230218_up.bin"
- waited for the switch to reboot after firmware updated

Two switches work as expected after the firmware updated but the third one is, regarding the WebUI, inaccessible. After entering credentials and pressing the Enter key the following content comes up:

The connection to the server was reset while the page was loading.

    The site could be temporarily unavailable or too busy. Try again in a few moments.
    If you are unable to load any pages, check your computer’s network connection.
    If your computer or network is protected by a firewall or proxy, make sure that Firefox is permitted to access the web.

Clients connected to the switch are working as they should, PoE is working as expected only the Web interface doesn't work.

What I've tried so far is:

1. Power cycling the switch; issue persists
2. make switch powerless for about 20 minutes and retry ; issue persists
3. Resetting the switch (pressed reset button for about 8 seconds; issue persists
3.1 Changed default password, again but at the stage of applying the updated password before mentioned "The connection was reset" info reappears 

Does anybody know how to make the WebUI work again?

Thanks in advance