Thank you for the question.
You can simple fix it by editing the design/themes/YOUR_THEME/templates/addons/ecl_ref_link/hooks/profiles/my_account_menu.post.tpl template.
Just replace the following part of code:
href="{"profiles.update#ref_link"|fn_url}"
with this one:
href="{"profiles.update"|fn_url}#ref_link"
Hope it will be helpful for you.
We will update the installation package soon.