There seems to be 3 things it wants to use dfault gem for. Aura, Pet, and arcane rune.
I have tried disabling the pet and aura requirement, and have also tried the debugging log.
Neither of which has been useful, or provided a solution.
It looks like it has been an issue in the past, however I cannot see the solution.
From part of the log:
[2021/03/04 16:27:35] [CheckPet:12020] - Executing subroutine.
[2021/03/04 16:27:35] [CheckPet:12026] - I need to summon a pet with: Aeldorb's Animation
[2021/03/04 16:27:35] [CheckPet:12032] - Summoning a pet with: Aeldorb's Animation
[2021/03/04 16:27:35] [CastSpell:4399] - Attempting to cast Aeldorb's Animation (Rank: 0)
[2021/03/04 16:27:35] [BotHideDoCommand:832] - /stand
[2021/03/04 16:27:35] [CastSpell:4422] - Attempting to cast Aeldorb's Animation using gem1
[2021/03/04 16:27:35] [BotHideDoCommand:832] - /multiline ; /stopcast ; /stopsong ; /casting "Aeldorb's Animation" gem1
[2021/03/04 16:27:35] [CheckClickies:8736] - Executing subroutine.
[2021/03/04 16:27:52] [CheckHeals:9666] - Executing subroutine.
[2021/03/04 16:27:52] [CheckHealPets:9949] - Executing subroutine.
[2021/03/04 16:27:52] [CheckAura:8105] - Executing subroutine.
[2021/03/04 16:27:52] [CheckInvis:10296] - Executing subroutine.
[2021/03/04 16:27:52] [CheckLoot:10597] - Executing subroutine.
[2021/03/04 16:27:52] [OnWriteChatColor:19265] - [643168062] MQ2Cast:[Memorize]: Aborting!
[2021/03/04 16:27:52] [OnWriteChatColor:19265] - [643168062] MQ2Cast:[Casting]: Aborting! (MemoE)
[2021/03/04 16:27:52] [CheckMerc:11529] - Executing subroutine.
[2021/03/04 16:27:52] [CheckFade:9454] - Executing subroutine.
[2021/03/04 16:27:52] [CheckCall:8552] - Executing subroutine.