Also, considering the "+" signs in the topic, perhaps it's referring to a combination of libfredo6 and another component version 63? Or maybe it's a typo. I'll assume it's a specific version with exclusive features.
from libfredo6 import api_router
Troubleshooting should cover common errors: missing dependencies, configuration issues, version mismatches. The user might also expect best practices, like documentation references and community support. libfredo6+version+63+exclusive