This question was a long while ago but for others who come looking. I've
found that you can simply clear your cache and it fixes this issue when
you are trying to access folders within explorer view and keep getting
the error. IMPORTANT:Please note that this will clear your
configurations views within folders such as the delivery log and
Profiles & Targets. This can be a bit annoying but is for your instance
only. This will probably take you a few minutes to reconfigure.Hope this
helps. It worke...