@shiger thank you for your answer. I don't use that font which actually doesn't exist I think since using "whatthefont" https://www.myfonts.com/pages/whatthefont for example it doesn't find it.
I have the same issue also using other browsers...

to find this "font" on the web link you shared... I need the "weird (art) Font" ... >__<
you do not remember any website that given you this font ?
if you do, post the lionk here with an screeshot ... we can check onto that website to see if it's the site... or the webbrowser issue easily

@Algedi80 Maybe a site issue?

yep, that's what I thought. and is the reason asked for some hyperlinks to double check them. I am sure I do not have that "kind" of font in my laptop ...

did you, or someone else who uses the same machine dowloaded tha font from elsewere?

[you can check maily opening your text procesor software (like Libreoffice Word] an checking on the fonts available to use on them.

if ypu do not use that font to make text documents \webpages
you migh uninstall it, and tha should solve it.

other ways, is going through main "opera Settings" and check there your web personalizations, ...

opera://settings/fonts [onto the web address]