nvm: "No such file or directory" when there is indeed such a file "node"

nvm --version: v0.37.2
$SHELL: /bin/bash
$SHLVL: 1
whoami: 'pi'
${HOME}: /home/pi
${NVM_DIR}: '${HOME}/.config/nvm'
${PATH}: ${NVM_DIR}/versions/node/v12.21.0/bin:/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin:/usr/local/games:/usr/games
$PREFIX: ''
${NPM_CONFIG_PREFIX}: ''
$NVM_NODEJS_ORG_MIRROR: ''
$NVM_IOJS_ORG_MIRROR: ''
shell version: 'GNU bash, version 5.0.3(1)-release (i686-pc-linux-gnu)'
uname -a: 'Linux 4.19.0-13-amd64 #1 SMP Debian 4.19.160-2 (2020-11-28) x86_64 GNU/Linux'
checksum binary: 'sha256sum'
OS version: Debian GNU/Linux 10  
curl: /usr/bin/curl, curl 7.64.0 (i686-pc-linux-gnu) libcurl/7.64.0 OpenSSL/1.1.1d zlib/1.2.11 libidn2/2.0.5 libpsl/0.20.2 (+libidn2/2.0.5) libssh2/1.8.0 nghttp2/1.36.0 librtmp/2.3
wget: /usr/bin/wget, GNU Wget 1.20.1 built on linux-gnu.
git: /usr/bin/git, git version 2.20.1
grep: /bin/grep (grep --color=auto), grep (GNU grep) 3.3
awk: /usr/bin/awk, awk: not an option: --version
sed: /bin/sed, sed (GNU sed) 4.7
cut: /usr/bin/cut, cut (GNU coreutils) 8.30
basename: /usr/bin/basename, basename (GNU coreutils) 8.30
rm: /bin/rm, rm (GNU coreutils) 8.30
mkdir: /bin/mkdir, mkdir (GNU coreutils) 8.30
xargs: /usr/bin/xargs, xargs (GNU findutils) 4.6.0.225-235f
nvm current: 
which node: ${NVM_DIR}/versions/node/v12.21.0/bin/node
which iojs: 
which npm: ${NVM_DIR}/versions/node/v12.21.0/bin/npm
npm config get prefix: /usr
npm root -g: /usr/lib/node_modules

      v12.21.0
         system
default -> 12 (-> v12.21.0)
iojs -> N/A (default)
unstable -> N/A (default)
node -> stable (-> v12.21.0) (default)
stable -> 12.21 (-> v12.21.0) (default)
lts/* -> lts/fermium (-> N/A)
lts/argon -> v4.9.1 (-> N/A)
lts/boron -> v6.17.1 (-> N/A)
lts/carbon -> v8.17.0 (-> N/A)
lts/dubnium -> v10.24.0 (-> N/A)
lts/erbium -> v12.21.0
lts/fermium -> v14.16.0 (-> N/A)