Package errors

Good day everyone i hope you are having a great day. I am new to unity and im still learning so i recently got a package and when i installed i got errors saying : the type of namespace name ‘NativeMultiMap<,>’ could not be found (are you missing a using directive or an assembly reference?) So is there a way i can fix this thanks in advance

Hi, sorry but you really need to provide more information to get help. Whcih binary version, which package are you refering too, which platform, what are your repro step etc…
There is not enough information to help. thanks