Joomla 6?

For sermons list, I use "table".

If I change the layout, I have always the error: 0 Class "SermonspeakerHelperSermonspeaker" not found.

I have the same error after disabled the sermonspeaker finder plugin.

For the Joomla layout, it based on G5_helium and I don't think I have any substitutions in the layout files (I will check deep soon). 

The G5 doesn't directly do anything with SermonSpeaker, that shouldn't be the issue.

But you may have overrides in that template. You can check that: Go to "System" -> "Site Templates" and then click on the "Details and Files" link of your active template.
In the "Editor" tab, you see a "html" folder on the left side. If you open that folder, do you see a "com_sermonspeaker" folder there? If so you need to delete that one (using the Manage Folders button on top).

I found this folder and I deleted it.

But the error still continue:
SermonspeakerHelperSermonspeaker" not found

I think you need to enable debugging in the Joomla configuration, to see from which file/line the error comes.
That should give you a lengthy callstack for the error.

Hi, here is the errors log

Thomas Hunziker wrote:

I think you need to enable debugging in the Joomla configuration, to see from which file/line the error comes.
That should give you a lengthy callstack for the error.

I am trying to send an image, but even though it is less than 90KB, it is considered too big.