Invalid PEM encoded certificate

Your software
My Mautic version is: 5.0.3
My PHP version is: 8.0.26
My Database type and version is: MySQL 8.0.36

Your problem
I am trying to test Mautic 5.0.3 on my local WAMP environment. I am getting a 500 server error trying to access the dashboard.

In the logs I’m getting the following error:
[2024-04-01T18:28:38.383641+00:00] mautic.CRITICAL: Uncaught PHP Exception InvalidArgumentException: “Invalid PEM encoded certificate” at C:\sites\mautic\vendor\litesaml\lightsaml\src\Credential\X509Certificate.php line 73 {“exception”:“[object] (InvalidArgumentException(code: 0): Invalid PEM encoded certificate at C:\sites\mautic\vendor\litesaml\lightsaml\src\Credential\X509Certificate.php:73)”}

Any suggestion on how to remedy this? Thanks!