Credits page throwing exception on 1.5.0

Describe the bug

After updating Castopod to version 1.5.0 credits page (eg https://castopod/credits) is throwing exception

Steps to reproduce

1. Update to 1.5.0
2. Try to open https://castopod/credits

Expected behavior

No exception

Actual behavior

Page error with exception below

Relevant logs and/or screenshots

ErrorException: Undefined variable $podcast in /REDACTED/themes/cp_app/pages/_layout.php:54
Stack trace:
#0 /REDACTED/themes/cp_app/pages/_layout.php(54): CodeIgniter\Debug\Exceptions->errorHandler()
#1 /REDACTED/vendor/codeigniter4/framework/system/View/View.php(213): include('...')
#2 /REDACTED/vendor/codeigniter4/framework/system/View/View.php(216): CodeIgniter\View\View->CodeIgniter\View\{closure}()
#3 /REDACTED/vendor/codeigniter4/framework/system/View/View.php(229): CodeIgniter\View\View->render()
#4 /REDACTED/app/Common.php(49): CodeIgniter\View\View->render()
#5 /REDACTED/app/Controllers/CreditsController.php(173): view()
#6 /REDACTED/vendor/codeigniter4/framework/system/CodeIgniter.php(902): App\Controllers\CreditsController->index()
#7 /REDACTED/vendor/codeigniter4/framework/system/CodeIgniter.php(457): CodeIgniter\CodeIgniter->runController()
#8 /REDACTED/vendor/codeigniter4/framework/system/CodeIgniter.php(340): CodeIgniter\CodeIgniter->handleRequest()
#9 /REDACTED/public/index.php(73): CodeIgniter\CodeIgniter->run()
#10 {main}

Context

• Castopod: 1.5.0
• OS: Ubuntu 22.04.2 LTS
• Browser: Firefox 115.0.2 (64-bit)
• Web server: Apache 2.4.52, php 8.1.12

Possible fixes

[If you can, link to the line of code that might be responsible for the problem]