WLM started reporting connection problem.

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WLM has just started reporting a connection problem from all my PC's on my
local network. Looking at connection setting there is no suggestion of a
connection problem and the option to start trouble shooter is greyed out.

Was all fine until the last couple of days, WLM status site suggests all is
well!

Anyone else having this problem? see error below....

Due to a connection problem, changes you make might not be applied to other
computers you use


.