I tackled the problem I think…
Following Jacob’s installation notes “Standard installation when not from the wp plugins page”, I downloaded and unzipped “wp-photo-album-plus.6.3.12.zip” and copied the content in the wp-content/plugins folder after backup and removing the old wppa plugin folder (that old one probably caused the problem). After that I activated the plugin in WP Admin -> Plugins.
I had to take action: Table XIII / 16 “Fix tags”. Mission completed !
After testing all seem to work fine !
Jacob, thanks for the helpfull notes !
Regards,
Harry.