Failed to load html page by R Markdown

Hi all, I am a newbie to R. It's beautiful. And I found R markdown could output R page to html page! However, my teammate and I both failed to do so..., when I access my own page, it does work; when I access my teammate's page, it doesn't work! Showed error message "redirect too many times". Could anyone click the URL below and help? Thanks a lot.

https://xavierc.rstudio.cloud/f825326b0c624eb48fb5dd5001e18a47/p/7885/testshiny.Rmd

https://smartsurrounding.rstudio.cloud/fd9bd7c36adf4778b01526b0a3969126/file_show?path=%2Fcloud%2Fproject%2Fhihi.html