If you are using WC 3.0 then you need to update theme to version 3.11. Do this and check if it fixes your problem.
Also, I would not recommend you to update plugins if they release the major update if you are not sure that your theme and additional plugins are compatible with this new update.
Price showing problem is solved now,
but i’m getting this message
“Your theme (XStore Child) contains outdated copies of some WooCommerce template files. These files may need updating to ensure they are compatible with the current version of WooCommerce. You can see which files are affected from the system status page. If in doubt, check with the author of the theme.
Our mission is to help Internet businesses and their customers interact in a way that mirrors real-world customer experience: personal, human, and fun.
Upload your translation files
Lorem ipsum dolor sit amet consectetur adipisicing elitsed do
Love us as much as we love you?
If you love XStore theme and have something nice to say
don’t hesitate to tell about this! We’d appreciate if you could take a moment to give us 5-stars!