I have this issue on classic with version 2.6.13

`Date: 2020-10-16 16:03:15
ID: 2
Error occured in: Global
Count: 1
Message: ..\AddOns\GSE\API\Storage.lua line 216:
attempt to index field '?' (a nil value)
Debug:
[C]: ?
GSE\API\Storage.lua:216: OOCPerformMergeAction()
GSE\API\Events.lua:446: ?()
...ddOns\EMA-Classic\Libs\AceTimer-3.0\AceTimer-3.0.lua:55:
...ddOns\EMA-Classic\Libs\AceTimer-3.0\AceTimer-3.0.lua:50
Locals:

AddOns:
Swatter, v8.2.6377 (SwimmingSeadragon)
ACP, v3.5.7
AtlasLootClassic, vv1.5.6
AtlasLootClassicData, vv1.5.6
AtlasLootClassicDungeonsAndRaids, vv1.5.6
AtlasLootClassicMaps, vv1.0.0
Auctionator, v8.1.0
BagBrother, v
ChatCopyPaste, v1.4
ClassicAggroHighlight, vv1.3.0
ClassicCastbars, v1.3.12
ClassicCastbarsOptions, v
ClassicCodex, vv1.3.9
ClassicHealPrediction, vv1.6.8
Clique, vv1.0.3-classic
Combuctor, v9.0.1
DBMCore, v1.13.61-4-gccacb9a
DBMDefaultSkin, v
DBMStatusBarTimers, v
Dejunk, v8.3.4
Dismounter, v1.2.1
Dominos, v9.0.4
DominosProgress, v
EMAClassic, vv1.13.4-Release-v0.9(121029)
EnhancedRaidFrames, v3.2.1
Examiner, vClassic Fan Update (1.09.3)
FarmLog, vv1.19
GatherMate2, v1.45.5
GSE, v2.6.13
GSEGUI, v2.6.13
GSELDB, v2.6.13
InFlightLoad, v1.13.005
ItemRack, v
LeatrixMaps, v1.13.81
LibHealComm40, v
MikScrollingBattleText, v5.7.149
NauticusClassic, v1.3.1
NovaWorldBuffs, v1.84
RaidSummon, v3.4.1
Recount, vv1.13.5c
Restocker, v6.2
Routes, vv1.6.3
SexyMap, vv5-classic
ShadowedUnitFrames, vv4.2.3-Classic-3-g4aeee73
Spy, v1.1.2
Stubby, v8.2.6376 (SwimmingSeadragon)
ThreatClassic2, v2.24
TidyPlatesThreatPlates, v10.0.1
TinyTooltip, v8.2.1
TomTom, vv11305-1.1.5
TradeSkillMaster, vv4.10.9
TradeSkillMasterAppHelper, vv4.0.9
TrinketMenu, v7.3.2
unitscan, v1.0.3
WeakAuras, v3.0.2
BlizRuntimeLib_enUS v1.13.5.11305
(ck=5a7)

`

IF it is throwing that error - it cant understand what it has received. I need more info on what you are trying to import.

Duplicate of #713