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Hi, I am getting the same error (Window blocked) when trying to register a new contract for EOS. What did you do to fix it? I am using MEW with Trezor. Thanks!

@banker2014 you have to allow pop up screens for trezor.

Thank you. How on Earth would anyone ever figure out that this was what is needed, especially when Chrome is surely not the default browser!? This is some key info that we all need to be sharing when writing tutorials.