Unofficial panel plugin that has been abandoned upstream. Last activity in 2013. Unlikely to be ported to GTK+3. Ebuild still uses xfconf.eclass.
The bug has been referenced in the following commit(s): https://gitweb.gentoo.org/repo/gentoo.git/commit/?id=dbb0ba6f4a1834861256342016a0413afb6aed94 commit dbb0ba6f4a1834861256342016a0413afb6aed94 Author: Michał Górny <mgorny@gentoo.org> AuthorDate: 2019-04-09 14:18:06 +0000 Commit: Michał Górny <mgorny@gentoo.org> CommitDate: 2019-04-09 14:18:06 +0000 package.mask: Last rite xfce-extra/xfce4-netspeed-plugin Bug: https://bugs.gentoo.org/682928 Signed-off-by: Michał Górny <mgorny@gentoo.org> profiles/package.mask | 7 +++++++ 1 file changed, 7 insertions(+)
What about possible replacement?
xfce-extra/xfce4-netload-plugin is a reasonable alternative