Followed all instructions and can't get past this error:
"An error occurred when trying to log in to Flickr: Error in retrieving token."
Also, the instructions on the user guide linked in the extensions reads:
"on the Flickr page, click on the “Edit auth flow for this app” link and copy your Callback URL, provided on Flickr2Piwigo configuration page."
There is no Callback URL on the configuration page. I just put in the root domain I am installing on.
Any help appreciated.