My install button in the launcher will not work and install 4.26

Development Getting Started & Setup
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1

My install button in the launcher will not work and install

2

Hi. I have the same problem, “+” button is gray, as if disabled. Did you solve the problem ?

3

looks like it is a problem to establish a connection. leave it for a some time and it will appear

4

Problem fixed here : Install Button Unreal Engine is greyed out - YouTube