KevinTheJedi
Thank you very much, the answer helped me a lot.
I searched on my old host and the new one, and I have no idea where the image went... 😅
However, thanks to your answer, I was able to see the name of the image and know that I was using it in the signatures of my emails, so I went to modify my templates and now I don't have this error when creating a ticket!
So thank you very much!
One last question if I get errors that tell me a file is in my database but not in the filesystem. If I delete the line in the database, does that fix the problem?