Hello,
Please increase PHP time limit to 500 and PHP post max size to 64M. If the problem with automatic theme updating won’t be solved, you can update theme via FTP https://xstore.helpscoutdocs.com/article/63-theme-update
Also, describe in more details what settings for menu do not work. You can use such screenshot maker as Lightshot and provide links of screenshots in Private Content.
Thanks in advance.
Regards