The Skeletal Brute skill causes an error when chosen in the 'Calc' tab.

[DmitryKovarniy]

Check version

• I'm running the latest version of Path of Building and I've verified this by checking the changelog

Check for duplicates

• I've checked for duplicate open and closed issues by using the search function of the issue tracker

What platform are you running Path of Building on?

Windows

Screenshots of crash/graphical issue, version and options menu

The issue occurs only with the "Skeletal Brute" gem out of all Skeletal gems. Adding any other Support gem to the "Skeletal Brute" group cause an error too.
Adding different skills (Auras, Skills, Spells, Minions gems) in Group does not trigger an error when selecting "Skeletal Brute" on "Calc" tab.

When the error appears, you can dismiss it, and the calculations will still be displayed. However, if you save the build without selecting a different skill in the Calc tab beforehand, it will corrupt the save file, making it impossible to load.

What are your system specifications and configuration?

OS: Windows 10, latest build.

How to reproduce the issue

1. Add the "Skeletal Brutes" gem to the gem Group, with or without Support Gems. (Adding a Skill; Spell; Aura gems in the same group does not cause an error to appear)

2. Go to the "Calc" tab.

3. Select "Skeletal Brutes."

4. An error will appear.

5. Dismiss the error and save the build without swapping "Skeletal Brutes" for a different skill first in "Calc" tab.

6. The save file becomes corrupted and cannot be loaded.

Character build code

[technophipsi]

Same with "Skeletal Sniper" Skill.

[robwilkes]

Same with Skeletal Arsonist

[DCC-Mel]

Same with Skeletal Frost Mages.
It did also happen when i chose the Infernalist Ascendancy and picked the Loyal Hellhound.

The error is exactly the same, CalcDefence line76

[deathbeam]

Resolved by PathOfBuildingCommunity/PathOfBuilding-PoE2-v2#1