What is the issue you are having?

When selecting a different spec on the spec bar nothing happens

What is the expected behavior?

Spec is switched

What actually happened?

Spec is not switched. Error is below

Suggested Solution/Workaround

No response

Errors

16x ...ns/ElvUI_MerathilisUI/Modules/Actionbars/SpecBar.lua:85: attempt to call upvalue 'SetSpecialization' (a nil value)
[ElvUI_MerathilisUI/Modules/Actionbars/SpecBar.lua]:85: in function <...ns/ElvUI_MerathilisUI/Modules/Actionbars/SpecBar.lua:82>

Locals:
self = Button {
 hover = Texture {
 }
 pushed = Texture {
 }
 Spec = 3
 SpecID = 66
 backdrop = Frame {
 }
 LootID = 0
}
button = "LeftButton"
(*temporary) = nil
(*temporary) = 2
(*temporary) = "attempt to call upvalue 'SetSpecialization' (a nil value)"
SetSpecialization = nil

ElvUI Changelog/Troubleshooting

• I have confirmed that I have read the Changelog and done the Troubleshooting Steps.
• I have disabled all addons except the AddOns called 'ElvUI' and 'ElvUI OptionsUI' and 'ElvUI_MerathilisUI' by using /muidebug on? This is important in order to rule out that any of your other addons are causing the issue. If you manage to pinpoint a conflict between ElvUI and/or MerathilisUI and another addon, make sure you include that information.
• I have verfied my issue doesn't exist in the default UI.
• I gave you information above on which XPack i play Classic, WotLK or Retail.

Thanks for your report. Fixed with the commit above. :)