@fom22 Thanks, I had the same issue and this helped.
I found out that get_user_locale() was added as late as WordPress 4.7.0, and I have been using an older version. However, the official plugin page at www.ads-software.com states that the minimum required WordPress version is 4.4.0, so the user is free to install the plugin and does not get warned.
Could you please reflect these facts in the plugin information?
(The line is present in all the versions from 2.3.8 up.)
Thanks.
