some error message both front-end and backend

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Hello,

Thanks for great work, after update Addon Library to the latest version, in Woocommerce sub site of our wordpress MU, there are some error message both front-end and backend:

at frontend:
Addon Library Error: Wrong xml file format: /var/www/mysite.com/htdocs/wp-content/plugins/addon-library/settings/general_settings.xml
Addon Library Error: Wrong xml file format: /var/www/mysite.com/htdocs/wp-content/plugins/addon-library/settings/general_settings.xml

how should I resolve it, thanks so much.

Alex