"Failed to write update file to disk." keep getting this error message during install

[zikliv]

I have Classic WoW downloaded and installed, and I'm able to login and play. I run the Zygor client as administrator, and when I try to install the Classic Guide, I get an error in red lettering "Failed to write update file to disk.", and the install fails. Does anyone know of a fix for this?

[ZG Support 2]

Our client programmer is working on a fix for this. He doesn't know how long it will take unfortunately. In the meantime you can find zip file links for your guides on the following page. Just make sure you are logged into the website first or it will only give you the free trial version of the guides. https://zygorguides.com/support/manual/manualinstall