I haven't had the time to drill on this completely but looks like your file is getting mangled as it got downloaded and edited
I extracted your file and put in a text editor. looks like this
name:String(64):Required,description:String(1024),subnets:Subnets(a.b.c.d/m;"...):Required,""supportRADIUS:Boolean(true,false):Required"",radiusSecret:String(32),""supportTACACS:Boolean(true,false):Required"",tacacsSecret:String(32),""singleconnect:Boolean(true,false)"",""legacyTACACS:Boolean(true,false)"",Location:String(256),Device Type:String(256)"
The quote characters seem duplicated and there is an extra quote in Subnets header field that should be removed
Can't guaranetee anything but worth getting into a text editor and trying to clean it up