Valery, SSS does not allow heroes to learn 9th/10th skills. It only provides the ability to check out more than 8 skills from the hero screen if applicable.

The classic map rule of Learning the 9th/10th skills was removed for the following reason:
- It was badly implemented due to technical limitations. The 9th/10th are not given by using the native way.
- We have way too many options/plugins in the Era Launcher Build for extending the skills limit. It led to confusion for players. Currently, there are 10 SS mod (by igrik), Maximum Secondary Skills (provides 12 skills limit by default, Option 824 by igrik) and unlimited secondary skills (bin patch in wog mod) all available from era launcher build.

An alternative / recommended way to raise the skill limit to 10 is to use the following script:
This provides the native way of learning secondary skills up to 10. Should be safe to be inserted in any map.