Found this on another plugin page:
IMPORTANT NOTICE
Google in September 2017 completely abandoned free stock API we used for Stock Quote plugin. That is reason why plugin does not work anymore. We’ll try to find other stock resource allowed by wordpress.org rules and update plugin. If you have any advise or example of free stock API, feel free to contact us at https://urosevic.net/c/
No word yet. Thanks for keeping the thread alive.
