Hi...
At the reflection, I told myself that I had not updated calibre for a while ...
In fact I had to reinstall my PC 2 months ago. I had reinstalled Calibre too, but it did not detect updates anymore. I went to find the order for linux (on the site of Calibre)
sudo -v && wget -nv -O-
https://download.calibre-ebook.com/linux-installer.py | sudo python -c "import sys; main = lambda: sys.stderr.write ('Download failed \ n'); exec (sys.stdin.read ()); main ()"
and I executed it ... MAGIC. it works.....
I just did it ... and it was only that !!
Have a nice week end