Getting E15005 Login timed out when logging into WCC

Document ID : KB000124803
Last Modified Date : 16/01/2019
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Issue:
You can have following symptoms

a) After entering User credentials , we get "Timeout. Server not responding"
b) If you succeed in logging into WCC, then switching from one tab to another takes too much time to appear
Resolution:
On Suse 12 and Red Hat 7 the rpm package 'rng-tools' is no longer installed by default. This package is required to generate secure cryptographic keys.
You can install this package as follows

a) on Red Hat, you can use following command
yum install rng-tools

b) on Suse, you can use the utility
yast