Same problem here, none of the workarounds suggested above helped. I was unable to identify the problem based on the log-entries accessible via the UI. Therefore, my working solution is as follows:
- enable SSH using the UI (no wifi needed)
- move your raspi and connect it to your router by cable (no UI needed)
- connect via ssh and setup your wifi using connmanctl as described here: External Content gist.github.comContent embedded from external sources will not be displayed without your consent.Through the activation of external content, you agree that personal data may be transferred to third party platforms. We have provided more information on this in our privacy policy.
- your raspi should now be connected via cable and via wifi
- move your raspi back to your tv (cable connection no longer needed)
For difficult cases, i would recommend to always use command line (via ssh) for wifi setup. In my case, the problem might have been caused by a combination of unusual SSID / long password / special characters in the password. This is not a problem if you configure using connmanctl directly.