No webinterface after connecting Shelly1PM to Wifi

When a Shelly (1PM) device boots in developer mode it shows its status and power usage in JSON. You can put the device into normal operational mode by sending the following HTTP command:

http://x.x.x.x/settings/developer?selftest_done=1

Reboot the device and it’s webinterface should show up:

http://x.x.x.x/reboot