I haven't published in that journal myself, but I have referred to papers from there, so I want to be sure they continue to exist. The scientific literature is supposed to be permanent. This looks like just a temporary glitch but it's worrisome that it's been this way for at least several days. (It's also worrisome that, going by the numbers of papers listed in MathSciNet, they seem to be slowing down in their publication rate.)
Update Nov 12: After the end of the French holiday weekend, the problem has been fixed and the site is back up again.