In the User portal, the fields will not save the password and notes: "Password does not satisfy complexity requirements due to missing number, special character, and uppercase letter." Or, "Password must be n or more characters."
This is by design. The JumpCloud administrator sets the password length and complexity requirements for users.
Create a password that complies with the length and complexity requirements stated. Questions regarding these requirements should be directed towards your JumpCloud administrator.
Tip: Password complexity requirements are set in the JumpCloud Admin Portal Security Settings.