[Xerte] Problem with pages containing LaTex script

[Emily Lumley]

Every time I preview a learning objective that has LaTex script on it I come up against Windows Security with the following message:
 
The server xerte.tor.nl at Global Women Leadership requires a username and password.
Warning: This server is requesting that your username and password be sent in an insecure manner (basic authentication without a secure connection)
 
If I press cancel it lets me continue but it does not show the latex script.
 
I am nothing to do with Global Women Leadership and I am not sure if this is a virus or a bug of some kind.
 
Many thanks
Emily
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