Uncaught TypeError when using `upsun tunnel:open`

[driftingly]

I can use upsun ssh without issues but get a fatal error when trying to tunnel.

upsun --version
Upsun CLI 5.10.3

php -v
PHP 8.4.20 (cli) (built: Apr 25 2026 10:44:51) (NTS clang 15.0.0)
Copyright (c) The PHP Group
Built by Laravel Herd
Zend Engine v4.4.20, Copyright (c) Zend Technologies
    with Zend OPcache v8.4.20, Copyright (c), by Zend Technologies

upsun tunnel:open
Enter a number to choose a project:
  [0] Project Name (xxxxxxxxxxxx)
 > 0

Enter a number to choose an environment:
Default: production
  [0] production
  [1] staging
 > 0

Fatal error: Uncaught TypeError: Platformsh\Cli\Tunnel\Tunnel::__construct(): Argument #4 ($remotePort) must be of type int, string given, called in phar:///Users/anthony/Library/Caches/upsun-tmp/legacy-5.10.3/upsun.phar/src/Service/TunnelManager.php on line 54 and defined in phar:///Users/anthony/Library/Caches/upsun-tmp/legacy-5.10.3/upsun.phar/src/Tunnel/Tunnel.php:12
Stack trace:
#0 phar:///Users/anthony/Library/Caches/upsun-tmp/legacy-5.10.3/upsun.phar/src/Service/TunnelManager.php(54): Platformsh\Cli\Tunnel\Tunnel->__construct('wo5kjjwqxurhi--...', 30000, '192.168.0.5', '5432', Array)
#1 phar:///Users/anthony/Library/Caches/upsun-tmp/legacy-5.10.3/upsun.phar/src/Command/Tunnel/TunnelOpenCommand.php(129): Platformsh\Cli\Service\TunnelManager->create(Object(Platformsh\Cli\Selector\Selection), Array)
#2 phar:///Users/anthony/Library/Caches/upsun-tmp/legacy-5.10.3/upsun.phar/vendor/symfony/console/Command/Command.php(341): Platformsh\Cli\Command\Tunnel\TunnelOpenCommand->execute(Object(Symfony\Component\Console\Input\ArgvInput), Object(Symfony\Component\Console\Output\ConsoleOutput))
#3 phar:///Users/anthony/Library/Caches/upsun-tmp/legacy-5.10.3/upsun.phar/vendor/symfony/console/Application.php(1117): Symfony\Component\Console\Command\Command->run(Object(Symfony\Component\Console\Input\ArgvInput), Object(Symfony\Component\Console\Output\ConsoleOutput))
#4 phar:///Users/anthony/Library/Caches/upsun-tmp/legacy-5.10.3/upsun.phar/src/Application.php(397): Symfony\Component\Console\Application->doRunCommand(Object(Platformsh\Cli\Command\Tunnel\TunnelOpenCommand), Object(Symfony\Component\Console\Input\ArgvInput), Object(Symfony\Component\Console\Output\ConsoleOutput))
#5 phar:///Users/anthony/Library/Caches/upsun-tmp/legacy-5.10.3/upsun.phar/vendor/symfony/console/Application.php(356): Platformsh\Cli\Application->doRunCommand(Object(Platformsh\Cli\Command\Tunnel\TunnelOpenCommand), Object(Symfony\Component\Console\Input\ArgvInput), Object(Symfony\Component\Console\Output\ConsoleOutput))
#6 phar:///Users/anthony/Library/Caches/upsun-tmp/legacy-5.10.3/upsun.phar/vendor/symfony/console/Application.php(195): Symfony\Component\Console\Application->doRun(Object(Symfony\Component\Console\Input\ArgvInput), Object(Symfony\Component\Console\Output\ConsoleOutput))
#7 phar:///Users/anthony/Library/Caches/upsun-tmp/legacy-5.10.3/upsun.phar/bin/platform(32): Symfony\Component\Console\Application->run()
#8 /Users/anthony/Library/Caches/upsun-tmp/legacy-5.10.3/upsun.phar(4): require('phar:///Users/a...')
#9 {main}
  thrown in phar:///Users/anthony/Library/Caches/upsun-tmp/legacy-5.10.3/upsun.phar/src/Tunnel/Tunnel.php on line 12