An error I don't know how to debug

[Renaud Bussières]

Hello,

Before restarting Emacs, I played a bit in my 'init.el' (which is 
tangled from an Org file) and I also updated several packages. Now a bug 
shows up when I start Emacs:

command-line: Buffer is read-only: #<buffer *scratch*>

That line appears in the *Messages* buffer.

Also, strangely, I use the 'dashboard.el' package and its footer line 
appears at the bottom even if the variable is set so it shouldn't show 
up. It used to not show up, but because of this bug I guess (??), it 
doesn't behave like it should?

I tried the "check-paren" function on the 'init.el', it doesn't find 
anything. I tried starting Emacs with the '--debug-init' option, it 
doesn't say anything.

Note that the first message I got was:

doom-mode-line--create-bar-image: Buffer is read-only: #<buffer *scratch*>

So I though this could be where the problem is, although I didn't change 
anything related to the doom-mode-line bar option. I used to (setopt 
doom-modeline-bar-with 0.1) so it doesn't appear, I changed that to '1', 
and now the error changed to the one above, 'command-line: ...'.

Any clue how I could fix this? I don't even know where the error comes from.

Thanks for your support,
Renaud