In operatingsystems_helper.rb, the code has a case statement based on record.name, defaulting to record.family if there is no match.

For operating systems based on XenServer, this defaults to the value of "Xenserver" (lower case "s"). However, the image is named "XenServer.png" (upper case "s").

One workaround is this patch:

--- operatingsystems_helper.rb.orig 2018-07-03 16:33:15.763945937 0000
++ operatingsystems_helper.rb 2018-07-03 16:49:26.710467826 +0000
@ -43,6 +43,10 @
record.family
end

+ if family == "Xenserver"
+ family = "XenServer"
+ end

image_tag(family".png", opts) + " "
end

However, a better fix might be to rename the family to "XenServer".

I also wonder if the case statement should be based on record.family...