System stuck at choose wifi - seems to be a bug?

I used the 2021 SD card image and got it running on Pi zero W1. It clearly connects to my Lan via wifi but emon keeps asking me to choose how I wish to connect. I choose wifi and it asks for user name and password then reboots and comes back to same page.

Error log shows:

ERROR|index.php|Not Authenticated|wifi/scan

file_get_contents(/etc/wpa_supplicant/wpa_supplicant.conf): failed to open stream: Permission denied in /var/www/emoncms/Modules/setup/setup_model.php

Feb  7 14:44:34 emonpi systemd[1]: Condition check resulted in Copy user wpa_supplicant.conf being skipped.
Feb  7 14:44:34 emonpi dhcpcd[322]: wlan0: starting wpa_supplicant
Feb  7 14:44:35 emonpi dhcpcd-run-hooks[367]: wlan0: starting wpa_supplicant
Feb  7 14:44:35 emonpi wpa_supplicant[363]: Successfully initialized wpa_supplicant

Can you select standalone mode at that setup screen? it should just continue to the emoncms login, without changing your manually set WiFi configuration.

Thanks - that worked