I was getting the following error when trying to install the SDK:
$ ./sdkmanager
./sdkmanager: /lib64/libcurl.so.4: no version information available (required by ./sdkmanager)
Gdk-Message: 15:47:15.166: Error 71 (Protocol error) dispatching to Wayland display.
I resolved it by launching it with the following option:
$ WEBKIT_DISABLE_COMPOSITING_MODE=1 ./sdkmanager