I wasn't multiboxxing at the time, only playing one character not in a party at all if that helps.

1x EMA\Modules\Interaction.lua:601: attempt to perform arithmetic on field 'COMMA' (a nil value)
[string "@ema\Modules\Interaction.lua"]:601: in function <EMA\Modules\Interaction.lua:594>
[string "=(tail call)"]: ?
[string "=[C]"]: in function `TaxiRequestEarlyLanding'
[string "@Zymux\Modules\Bars\vehicle.lua"]:21: in function <Zymux\Modules\Bars\vehicle.lua:19>

Locals:
sender =

{
moduleDisplayName = "Interaction"
modules = {
}
SettingsToggleTellBoEEpic = defined @ema\Modules\Interaction.lua:446
SettingsSetMessageArea = defined @ema\Modules\Interaction.lua:390
SecureHook = defined @arkinventory\Externals\Ace3\AceHook\AceHook-3.0.lua:336
settingsDatabaseName = "InteractionProfileDB"
TeamMount = defined @ema\Modules\Interaction.lua:711
EMAOnSettingsReceived = defined @ema\Modules\Interaction.lua:457
SetDefaultModulePrototype = defined @!KalielsTracker\Libs\AceAddon-3.0\AceAddon-3.0.lua:409
LeavsTaxi = false
IsEnabled = defined @!KalielsTracker\Libs\AceAddon-3.0\AceAddon-3.0.lua:451
SettingsToggleDisMountWithTeam = defined @ema\Modules\Interaction.lua:421
ScheduleTimer = defined @arkinventory\Externals\Ace3\AceTimer\AceTimer-3.0.lua:94
SettingsToggleTakeTaxi = defined @ema\Modules\Interaction.lua:400
AmNotMounted = defined @ema\Modules\Interaction.lua:775
EMARegisterModule = defined @ema\Core\Module.lua:57
EMAChatCommand = defined @ema\Core\Module.lua:109
RegisterMessage = defined @tomtom\libs\CallbackHandler-1.0\CallbackHandler-1.0.lua:90
UnregisterMessage = defined @tomtom\libs\CallbackHandler-1.0\CallbackHandler-1.0.lua:153
SettingsCreateTaxi = defined @ema\Modules\Interaction.lua:222
hooks = {
}
db = {
}
ReceiveRandomMountWithTeam = defined @ema\Modules\Interaction.lua:789
SetEnabledState = defined @!KalielsTracker\Libs\AceAddon-3.0\AceAddon-3.0.lua:424
Hook = defined @arkinventory\Externals\Ace3\AceHook\AceHook-3.0.lua:274
SettingsToggleMountInRange = defined @ema\Modules\Interaction.lua:431
SettingsTogglerequestStop = defined @ema\Modules\Interaction.lua:405
TaxiRequestEarlyLanding = defined @ema\Modules\Interaction.lua:594
OnEnable = defined @ema\Modules\Interaction.lua:175
TakeTaxiNode = defined @ema\Modules\Interaction.lua:570
SettingsChangeTaxiTimer = defined @ema\Modules\Interaction.lua:410
OnInitialize = defined @ema\Modules\Interaction.lua:150
NewModule = defined @!KalielsTracker\Libs\AceAddon-3.0\AceAddon-3.0.lua:235
EMASendSettings = defined @ema\Core\Module.lua:66
COMMAND_CLOSE_TAXI = "EMACloseTaxi"
TAXIMAP_OPENED = defined @ema\Modules\Interaction.lua:512
GetName = defined @!KalielsTracker\Libs\AceAddon-3.0\AceAddon-3.0.lua:279
EMASendCommandToTeam = defined @ema\Core\Module.lua:71
name = "Interaction"
SettingsPushSettingsClick = defined @ema\Modules\Interaction.lua:218
settingsFrame = {
}
Disable = defined @!KalielsTracker\Libs\AceAddon-3.0\AceAddon-3.0.lua:314
GetConfiguration = defined @ema\Modules\Interaction.lua:85
Unhook = defined @arkinventory\Externals\Ace3\AceHook\AceHook-3.0.lua:418
Print = defined @arkinventory\Externals\Ace3\AceConsole\AceConsole-3.0.lua:54
OnMessageAreasChanged = defined @ema\Modules\Interaction.lua:385
COMMAND_MOUNT_DISMOUNT = "EMAMountDisMount"
TakesTaxi = false
EnableAutoLoot = defined @ema\Modules\Interaction.lua:860
UPDATE_BINDINGS = defined @ema\Modules\Interaction.lua:97