Link Not Allowed On Jarvee

I created an LP page on sites.google.com and put my aff link into the LP page. Then I shortened the sites.google.com url to bitly.com, but it still prompted link is not allowed., I would like to ask how to hide their aff link?

If you have a domain you can use a redirection script.

To do it for free, get a tumblr account, then modify the theme and add a javascript / meta redirect. This used to work on tumblr, haven't tested it for a couple of years but I imagine it still works. It does rely on the ISG URL checker to not follow javascript / meta redirects , but I imagine they don't and only follow server redirects such as 301 / 302