Hello,
1) You did not install the Wishlist plugin in XStore > Plugin installer https://prnt.sc/NdkBnzj1_4EQ, so that’s why it was missing. I installed that. Check now.
2) You set the buy now button size to 0.2 in Theme Options > Header builder > Button that’s why it was so small. I set it to 1 https://prnt.sc/RGArq1O7oA30 Check now.
3) Lato font was missing. I removed the Lato font folder from wp-content/fonts/ and chose font again in Theme Options > Typography and it’s ok now. Check the About us and Contacts page now, please.
Let me know if you have any other questions.
Regards