1.16.1 server creation error

Hey all, trying to create a 1.16.1 server and when running the paper jar with a .bat I keep getting the error:
Downloading vanilla jar…
Downloaded vanilla jar is not valid
Wondering what could be wrong, Thanks in advance

try downloading the vanilla server jar manually and placing it in the cache folder, that suggests that something is mangling the download, antivirus, firewall? etc