[Bug]: Cannot connect to server on Ubuntu 20.04

[ChesterDenn]

Application

Outline Client

Describe the bug

/bin/bash: /usr/bin/echo: No such file or directory
shasum: standard input: no properly formatted SHA checksum lines found

command is running as root but failed:  Error: Command failed: cd "/home/sithuaung/WWVPN"; "/usr/bin/pkexec" --disable-internal-agent /bin/bash -c "echo SUDOPROMPT; trap \"/usr/bin/chattr -R -i /tmp/Ro1bMd\" EXIT; /usr/bin/chattr -R +i /tmp/Ro1bMd && /usr/bin/echo \"e0644a3750b6c770e4f2f2e2e7de0de1e46386eed733d7841f35d9e4aa53c1cd  /tmp/Ro1bMd/install_linux_service.sh\" | /usr/bin/shasum -a 256 -c && /usr/bin/echo \"0a2d2b874d4d200145b1e3a7cc5818fb27e5c0ed69ebb4f4057e066e0b7fdc4a  /tmp/Ro1bMd/OutlineProxyController\" | /usr/bin/shasum -a 256 -c && /usr/bin/echo \"8bfab08036441bcbb558927bdecd97eebf8c2d365a2a7fdb6c0032c2afc965a2  /tmp/Ro1bMd/outline_proxy_controller.service\" | /usr/bin/shasum -a 256 -c && \"/tmp/Ro1bMd/install_linux_service.sh\" \"sithuaung\""
/bin/bash: /usr/bin/echo: No such file or directory
shasum: standard input: no properly formatted SHA checksum lines found

    at ChildProcess.exithandler (node:child_process:408:12)
    at ChildProcess.emit (node:events:526:28)
    at ChildProcess.emit (node:domain:475:12)
    at maybeClose (node:internal/child_process:1092:16)
    at Socket.<anonymous> (node:internal/child_process:451:11)
    at Socket.emit (node:events:526:28)
    at Socket.emit (node:domain:475:12)
    at Pipe.<anonymous> (node:net:687:12) {
  killed: false,
  code: 1,
  signal: null,
  cmd: 'cd "/home/sithuaung/WWVPN"; "/usr/bin/pkexec" --disable-internal-agent /bin/bash -c "echo SUDOPROMPT; trap \\"/usr/bin/chattr -R -i /tmp/Ro1bMd\\" EXIT; /usr/bin/chattr -R +i /tmp/Ro1bMd && /usr/bin/echo \\"e0644a3750b6c770e4f2f2e2e7de0de1e46386eed733d7841f35d9e4aa53c1cd  /tmp/Ro1bMd/install_linux_service.sh\\" | /usr/bin/shasum -a 256 -c && /usr/bin/echo \\"0a2d2b874d4d200145b1e3a7cc5818fb27e5c0ed69ebb4f4057e066e0b7fdc4a  /tmp/Ro1bMd/OutlineProxyController\\" | /usr/bin/shasum -a 256 -c && /usr/bin/echo \\"8bfab08036441bcbb558927bdecd97eebf8c2d365a2a7fdb6c0032c2afc965a2  /tmp/Ro1bMd/outline_proxy_controller.service\\" | /usr/bin/shasum -a 256 -c && \\"/tmp/Ro1bMd/install_linux_service.sh\\" \\"sithuaung\\""'

Steps to reproduce

1. Open the application
2. Click on connect to server
3. Cannot connect and provided error log display in background

What did you expect to happen?

No response

What actually happened?

No response

Outline Version

1.13.1 (476278)

What operation system are you using?

Linux

Operating System Version

Ubuntu 20.04

Screenshots and Videos

No response

[sbruens]

Looks like your system does not have echo installed in /usr/bin. Could you either create a symlink or install it fresh.