For anyone with the same issue, I just discovered this plugin which is far easier to use: https://ww.wp.xz.cn/plugins/header-footer-code-manager/
Same result on other page I tried this on. Oh well.
Thanks for the advice. Tried deactivating one at a time, but no joy 🙁
Will try add it on another page, but might have to look for another plugin.
ok, thanks steve. i’ll look into WPmu
