What steps will reproduce the problem?

1. Open Options>Bars>Clickable Bars
2. Set Middle Mouse option to "Super Emphasize" AND "Remove Other"
3. Create Test Bar
4. Middle Click on test bar

What version of BigWigs are you using? (Stating 'latest' is not useful)

v54

Do you have an error log of what happened?

2x BigWigs_Plugins\Emphasize.lua:362: attempt to call method 'CheckOption' (a nil value)
BigWigs_Plugins\Emphasize.lua:362: in function BigWigs_StartEmphasize' BigWigs_Plugins\Emphasize.lua:406: in function ?'
BigWigs\Loader.lua:670: in function SendMessage' BigWigs_Plugins\Bars.lua:1360: in function ?'
BigWigs_Plugins\Bars.lua:1307: in function <BigWigs_Plugins\Bars.lua:1305>

Locals:
self =

{
SetDefaultModuleLibraries = defined @bagnon\external\Wildpants\libs\AceAddon-3.0\AceAddon-3.0.lua:398
Enable = defined @bagnon\external\Wildpants\libs\AceAddon-3.0\AceAddon-3.0.lua:325
NewModule = defined @bagnon\external\Wildpants\libs\AceAddon-3.0\AceAddon-3.0.lua:266
EnableModule = defined @bagnon\external\Wildpants\libs\AceAddon-3.0\AceAddon-3.0.lua:363
modules = {
}
CancelTimer = defined @ChocolateBar\libs\AceTimer-3.0\AceTimer-3.0.lua:145
IterateEmbeds = defined @bagnon\external\Wildpants\libs\AceAddon-3.0\AceAddon-3.0.lua:473
defaultModuleLibraries = {
}
TimeLeft = defined @ChocolateBar\libs\AceTimer-3.0\AceTimer-3.0.lua:170
ScheduleRepeatingTimer = defined @ChocolateBar\libs\AceTimer-3.0\AceTimer-3.0.lua:127
CancelAllTimers = defined @ChocolateBar\libs\AceTimer-3.0\AceTimer-3.0.lua:158
SetDefaultModulePrototype = defined @bagnon\external\Wildpants\libs\AceAddon-3.0\AceAddon-3.0.lua:440
name = "BigWigs_Plugins_Super Emphasize"
IsEnabled = defined @bagnon\external\Wildpants\libs\AceAddon-3.0\AceAddon-3.0.lua:482
orderedModules = {
}
ScheduleTimer = defined @ChocolateBar\libs\AceTimer-3.0\AceTimer-3.0.lua:92
DisableModule = defined @bagnon\external\Wildpants\libs\AceAddon-3.0\AceAddon-3.0.lua:381
defaultDB = {
}
RegisterMessage = defined @BigWigs\Loader.lua:640
UnregisterMessage = defined @BigWigs\Loader.lua:655
BigWigs_TempSuperEmphasize = defined @BigWigs_Plugins\Emphasize.lua:403
baseName = "BigWigs_Plugins"
BigWigs_PlayCountdownNumber = defined @BigWigs_Plugins\Emphasize.lua:409
IsModule = defined @bagnon\external\Wildpants\libs\AceAddon-3.0\AceAddon-3.0.lua:248
db = {
}
SendMessage = defined @BigWigs\Loader.lua:664
IsSuperEmphasized = defined @BigWigs_Plugins\Emphasize.lua:394
TestEmphasize = defined @BigWigs_Plugins\Emphasize.lua:383
SetEnabledState = defined @bagnon\external\Wildpants\libs\AceAddon-3.0\AceAddon-3.0.lua:455
BigWigs_StopEmphasize = defined @BigWigs_Plugins\Emphasize.lua:375
enabledState = true
BigWigs_StartEmphasize = defined @BigWigs_Plugins\Emphasize.lua:361
RegisterEvent = defined @BigWigs_Core\Core.lua:50
SetDefaultModuleState = defined @bagnon\external\Wildpants\libs\AceAddon-3.0\AceAddon-3.0.lua:418
displayName = "Super Emphasize"
defaultModuleState = true
IterateModules = defined @bagnon\external\Wildpants\libs\AceAddon-3.0\AceAddon-3.0.lua:468
OnPluginEnable = defined @BigWigs_Plugins\Emphasize.lua:337
GetModule = defined @bagnon\external\Wildpants\libs\AceAddon-3.0\AceAddon-3.0.lua:241
GetName = defined @bagnon\external\Wildpants\libs\AceAddon-3.0\AceAddon-3.0.lua:310
moduleName = "Super Emphasize"
UnregisterEvent = defined @BigWigs_Core\Core.lua:57
Disable = defined @bagnon\external\Wildpants\libs\AceAddon-3.0\AceAddon-3.0.lua:345
}
_ = nil
module = {
SetDefaultModuleLibraries = defined @bagnon\external\Wildpants\libs\AceAddon-3.0\AceAddon-3.0.lua:398
RegisterEnableMob = defined @BigWigs_Core\Core.lua:193
Enable = defined @bagnon\external\Wildpants\libs\AceAddon-3.0\AceAddon-3.0.lua:325
NewModule = <function

Any additional information? (example: WoW language if not English) (Attach screenshots here if available, do not link externally)

I didnt try any other mouse buttons or mouse button settings.