Path issue in github self-hosted runners Setup

I have created 8 GitHub runners on my local machine and set them up. However, when I try to run them using runsvc.sh, I encounter the following errors:

/github-runners/r1/runsvc.sh: line 17: ./externals/node16/bin/node: No such file or directory
/github-runners/r2/runsvc.sh: line 17: ./externals/node16/bin/node: No such file or directory
/github-runners/r3/runsvc.sh: line 17: ./externals/node16/bin/node: No such file or directory
/github-runners/r4/runsvc.sh: line 17: ./externals/node16/bin/node: No such file or directory
/github-runners/r5/runsvc.sh: line 17: ./externals/node16/bin/node: No such file or directory
/github-runners/r6/runsvc.sh: line 17: ./externals/node16/bin/node: No such file or directory
/github-runners/r7/runsvc.sh: line 17: ./externals/node16/bin/node: No such file or directory
/github-runners/r8/runsvc.sh: line 17: ./externals/node16/bin/node: No such file or directory

However, if I navigate to ./externals/node16/bin/node in r1 and execute it directly, it works fine and opens the Node.js environment.

Here is my service file:

[Unit]
Description=Manage GitHub Actions Runners
After=network.target

[Service]
Type=simple
User=myuser
WorkingDirectory=/home/myuser/github-runners/

ExecStart=/bin/bash -c 'for i in {1..8}; do /home/myuser/github-runners/r$i/runsvc.sh start --instance r$i; done'

Restart=always
RestartSec=3

[Install]
WantedBy=multi-user.target