New comment by FollieHiyuki on void-packages repository

https://github.com/void-linux/void-packages/issues/33167#issuecomment-929407474

Comment:
The error literally said what went wrong.
I assume your $XDG_RUNTIME_DIR is set to `/tmp` which is owned by root. You should make it a subdir of `/tmp` instead.

For example, here is a snippet from the script I use to start sway:
```bash
if [ -z "${XDG_RUNTIME_DIR}" ]
then
	userid=$(id -u ${USER})
	export XDG_RUNTIME_DIR="$(mktemp -d /tmp/${userid}-runtime-XXXXXX)"
	if [ ! -d "${XDG_RUNTIME_DIR}" ]
	then
		mkdir -p "${XDG_RUNTIME_DIR}"
		chmod 0700 "${XDG_RUNTIME_DIR}"
	fi
fi

```