I can reproduce by running :GBrowse on e.g. plugin/fugitive.vim on:
- MacVim r182 (Vim 9.1.1887)
But not on:
- nvim v0.11.2
- vim 9.1 (bundled with macos 26.1)
I have rhubarb.vim installed alongside, and then when running :GBrowse with it disabled we do not get the error but:
fugitive: no GBrowse handler installed for 'https://github.com/tpope/vim-fugitive'