OC Configurator 2.49.0.2 Config Checker Not Working

I want to check my config.plist for OC 0.7.3 but i get Nothing to read here error

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https://preview.redd.it/dipwz9izz6o71.png?width=1104&format=png&auto=webp&s=7fbc68e6d0fddf67d584cc8de8ab81bf33b3b0e1