Javascript error due to Nginx plugin when trying to connect sendcloud to woocommerce

When I try to connect sendcloud, a plugin and mailservice to woocommerce on my wordpress website it doesn’t work. Sendcloud said it is due to the following error, below. And this is due to the Nginx plugin of infinity free. I wonder if there’s anything that could be done about this problem.

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Please check the KB next time first: https://infinityfree.net/support/javascript-error-using-api-or-mobile-android-app/