Some characters can't be used when creating a name for your watch list. Only letters, numbers, spaces, and the following characters can be used: ampersand (@), period (.), plus sign (+), hyphen (-), and underscore (_).
If you try to use a character outside these parameters, the Save button will become unresponsive and will not allow you to move forward. You'll see an error message below the Name field.
Solution
To fix this issue, ensure you are only using allowable characters in your watch list name.