You’re using message.member.roles.some which is invalid with discord.js v12 - you need to update to message.member.roles.cache.some.
Also, if you want to add a role you must use a RoleResolvable, in your code you’re trying to add something that will either be true or false - not a RoleResolvable.
You should instead be using message.member.roles.cache.find(role => role.name === "Member") which will return a RoleResolvable.