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This causes an error as 'indexOf' is undefined. It looks like a setup to add utm parameters to links, but it isn't working. I would either rewrite or remove that.
I'm not sure what page you are seeing that error on, but if it's an externally hosted site you'll need to modify those records to allow access. If it's hosted in HubSpot, you cannot edit these and would have to instead remove the offending content. The upgrade insecure requests is an nginx setting to force https