I am having exactly the same issue.
We have the same issue on multiple sites with this plugin. Any news on this?
Same issue.
A file is missing, WordPress deactivates this part of plugin.
The plugin autonav/autonav-widget.php is deactivated on following error: extension file does not exist.
Même problème.
Il manque un fichier, WordPress désactive ce plugin automatiquement.
L’extension autonav/autonav-widget.php a été désactivée suite à l’erreur : Le fichier de l’extension n’existe pas.
Could you please try removing the AutoNav plugin (and not the AutoNav Widget at the same time), and re-adding it?
How is this even doable? Isn’t the widget part of the plugin?
I downloaded a fresh copy, manually removed the old, and installed the new, and it still won’t reflect the widget being up-to-date:
https://www.evernote.com/l/AAKxU9LedkNKOpaKkPBJSzS_2lKtkKnfa0c
Uninstalling and reinstalling did not help on my site. I think the solution involves uploading new code that complies with the new WP update process.
Try the 1.5.10 update. A relatively simple fix but it should work.