Error 5c and not being able to contact support

I'm getting error 5c which seems to be linked to my IP. I want to contact support but the page does not load for me (is my IP banned from that too?)

We're testing a new feature that gives the option to view discussion comments in chronological order. Some testers have pointed out situations in which they feel a linear view could be helpful, so we'd like see how you guys make use of it.

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