For sappy, I think that it is written in the manual.
http://ngmansion.xyz/wiki/hackfe/index.php?解説/FEBuilderGBA/How_to_obtain_necessary_tools_to_use_FEBuilderGBA_EN
Since sappy is written in VB6 which is an old programming language, running on modern operating systems has runtime problems.
However, there is an installer to solve this.
Please check this out for details.
As for the skill system, I am not familiar because it is not detailed.
The possibilities are as follows
- FEBuilderGBA is not able to correctly capture that skill
- Bug in SkillSystems
- Misconfiguring or do not meet the prerequisites.
- Other
For #1,
It is a bug, so I have to fix it.
However, in order to prove this, please try trying to reproduce it on the SkillSystems official boss rush stage.
More detailed information is needed.
For #2,
For SkillSystems bugs please report in SkillSystems thread.
Also, FEBuilderGBA is currently equipped with 2018/5/15 SkillSystems.
It may be fixed by the latest version.
Converting SkillSystems to patch format is very time-consuming.
Therefore, the update will be delayed for a while.
For #3,
Please question with SkillSystems thread.