[BlueOnyx:24434] Use Let'sEncrypt with caution on main server management page

[^Gecko^]

After installing and updating 5210R, if I go to Security>SSL and use Let's
Encrypt, the page fails to load, then I am no longer able to access the web
interface by any means.  I don't know how to un-do whatever letsencrypt
does, I have to reinstall from scratch.

Has anyone else had this problem?
Thanks
^Gecko^
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