Hello,
1/ Try to disable all the third-party plugins (including cache plugins), that do not come bundled with XStore https://xstore.helpscoutdocs.com/article/36-included-plugins , clear cache of browser, and check then. Maybe one of the additional plugins is a reason for the problem.
2/ Provide temporary FTP access, so we can take a closer look.
3/ Provide server error log and link to your Instagram account
Regards