WowAce

It works (thank you LeahWolf) but I was left with an error that I finally traced to this addon.
Message: AceEvent30Frame:RegisterEvent(): AceEvent30Frame:RegisterEvent(): Attempt to register unknown event "PLAYER_PET_CHANGED"
If you are having this issue then updatie line 342 and 361 of Classtimer.lua

Old:

Line 342: Self:RegisterEvent('PLAYER_PET_CHANGED')

Line 361: function ClassTimer:PLAYER_PET_CHANGED()

New:

Line 342: self:RegisterEvent('UNIT_PET')

Line 361: function ClassTimer:UNIT_PET()

Thanks to Palonblade, issue 113.

In reply to ZalidTheBur:

 this really needs to be applied to the main release

None of the suggested fixes actually fix the addon. Typing /classtimer doesn't even load the menu anymore, and I can't load it with Escape > Options > Addons either. Changing DIALOG to OVERLAY only allows me to see the buffs and debuffs I'm already tracking. Without the ability to load the menu, I can't add or remove buffs and debuffs. It's stuck in its current state until there's a complete fix.

In reply to savipalooza:

 Thats a problem on your end, its working perfectly on mine.

Try exit game and completely remove addon and redownload then change line 120 again before starting wow

In reply to kopidruid:

 Nothing in any of these comments worked for me. I reinstalled the addon, installed different versions, changed a word in a line, etc. When I type /classtimer and hit Enter, it acts as if I'm not pressing Enter. I can pull up TellMeWhen with /tmw, and I can enter text in chat, but I just can't enter /classtimer. The addon is bricked.

In reply to savipalooza:

 Hopfully you got it working as it definetly does work with the fix from LeahWolf.
FYI I removed the old install and reinstalled 2.4.90001.1 and then applied the fix.

In reply to savipalooza:

Seeing that the addon uses Ace3, I checked their changelog, and found out what had broken our beloved ClassTimer:

"In 10.0.0.45687, the Tab functionality was re-designed, requiring us to keep a local copy if we want identical behavior to continue to be available in the future."

So what I did is I just copied the latest release of Ace3 to the Libs directory.

Since then, it works fine.

In reply to jaurin:

I have been trying this fix for a couple of hours, and I haven't been able to be successful.

Did you simply copy-and-paste the full entirety of the latest Ace3 addon directly into Classtimer's "LIbs" folder?

Also, were you using an unedited version of Classtimer, or had you already applied the "DIALOG" to "OVERLAY" fix?

In reply to LeahWolf:

Yes, I applied the fix, and copied the whole Ace3 addon into the folder.

In reply to jaurin:

 Thank you!

To help other people, the full solution for me was as follows:

1.) Uninstall Classtimer, and reinstall using the "ClassTimer-2.4.90001.1.zip" file. If you are using a different version, it appears to often fail.

2.) Within the "ClassTimer" folder, open the "ClassTimer.lua" file, and change the word "DIALOG" to "OVERLAY" on line 120. Save and close the file.

3.) Within the "ClassTimer" folder, navigate to the "Libs" folder, and delete all folders/files contained within.

4.) Download the latest archive of "Ace3". Currently, that is "Ace3-r1297-alpha.zip".

5.) Extract all of the contents into ClassTimer's "Libs" folder. There should now be 16 folders and 10 files inside the "Libs" folder.

However, I still can't get the addon to load for an Evoker character. I will check the again errors soon and see what needs to be edited for a solution.

Quote from opiath >>

In reply to LeahWolf:

 

To make it work in the Dragonflight patch make the following adjustment in ClassTimer.lua:

Line 120:  Change 'DIALOG' to 'OVERLAY'

Thank you for the fix!

Worth noting that you may speak about the 2020 "Release" version (2.4.90001.1) since the latest ClassTimer version, 2.4.90001.1-5-g2ff0b0b-alpha (uploaded one year later) does not have a 'DIALOG' in line 120.

Instead, the exact same line

bar.icon = bar:CreateTexture(nil, 'DIALOG')

 can be found in line 121. Replacing that with OVERLAY makes the latest version usable as well.

I am another user who is extremely fond of this addon, and feel pretty much powerless without it.

I wish I could contribute meaningful information to lead to a fix, but I receive no LUA errors at all when I load my client. The addon appears to load properly via the "/classtimer" command, and settings and spells can be configured as normal. All of my past settings are still saved, too. However, no timer bars appear when I cast a spell (like Shadow Word: Pain) on an enemy, or a heal (like Renew) on a friendly player.

In reply to LeahWolf:

To make it work in the Dragonflight patch make the following adjustment in ClassTimer.lua:

Line 120:  Change 'DIALOG' to 'OVERLAY'

In reply to opiath:

 This works great, thank you so much!

In reply to opiath:

 You've just saved my life. Thank you

In reply to opiath:

 ABSOLUTE LEGEND ! I can play wow again now

In reply to opiath:

 /kiss

In reply to opiath:

 /kiss

In reply to opiath:

 /kiss

In reply to LeahWolf:

 Thank you so much. This is one addon I really need :-)