I reached out to our COS development team and the "Import cycle detected for path:" occurs when there is some recurrsion happening. I can't tell where it is based off your current code sample, but this is the basic idea of what is going on.
Recursion in the COS:
Recursion occurs when a user is including File A on their Template B, but within File A, they are also including Template B. So to start diagnosing your issue, I would go and check what files/templates are being included in your current structures.
Let me know how this works out, also if you have a link to the template you're working on, I may be able to help you out further.