Setup kbfs without redirector on a server without root access

I am trying to run keybase on a server where I don't have root access. Following, https://keybase.io/docs/linux-user-guide#installing-keybase-without-root-privileges advice, I did the following:

mkdir src && cd src/
wget https://prerelease.keybase.io/keybase_amd64.rpm
rpm2cpio keybase_amd64.rpm | cpio -idmv
ln -s $HOME/src/usr/bin/keybase $HOME/bin
ln -s $HOME/src/usr/bin/run_keybase $HOME/bin
ln -s $HOME/src/usr/bin/kbfsfuse $HOME/bin

after doing the login,

run_keybase -g returns

WARNING: Expected the keybase executable to be /usr/bin/keybase, but it's
         /home/myuser/bin/keybase instead. Do you have multiple versions installed?
Export KEYBASE_PATH_WARNING=0 to silence this warning.
Launching keybase service...
Starting the redirector...
Starting KBFS...
run_keybase: Success!

KBFS failed to FUSE mount at /run/user/1012/keybase/kbfs: fusermount: exec: "fusermount": executable file not found in $PATH

It seems the mountdirdefault is /run/user/SOMENUMBER/keybase/kbfs, but KFBS is not running.

Is the problem that fusermount is missing or is it with redirector?

I can't edit /etc/keybase/config.json, but tried to edit ~/.config/keybase/config.json with

{
  "disable-root-redirector": true
}

~/.cache/keybase/keybase.redirector.log indicates:
nohup: failed to run command ‘keybase-redirector’: No such file or directory

What should I try (or read) next to mount kbfs?

Start by reviewing the non-root installation steps, the run_keybase -g output, and the ~/.cache/keybase/keybase.redirector.log entry. Check how the user-level config setting, fusermount lookup, and keybase-redirector path relate to the failed KBFS mount. Done means identifying the blocking requirement or configuration issue and documenting a reproducible non-root mounting path.