LoadError html/sanitizer

Hi, do you have a idea?
This problem appeared today, but yesterday it was ok, and I changed
nothing…

LoadError in Demandes#show

Showing
/home/caritas/public_html/web_gdc/app/views/demandes/show.html.erb where
line #12 raised:

no such file to load – html/sanitizer

Extracted source (around line #12):

9:

nom_folders: <%= @demande.nom_folders %>


10:

nom_taches: <%= @demande.nom_taches %>


11:

nom_problems: <%= @demande.nom_problems %>


12:

commentaires: <%= simple_format(@demande.commentaires)
%>


13:

Created_at: <%=
@demande.created_at.localtime.strftime("%d/%m/%Y (%Hh%M)") %>


14:

Updated_at: <%=
@demande.updated_at.localtime.strftime("%d/%m/%Y (%Hh%M)") %>


15:

log:<%= simple_format(@demande.log) %>

I’m also having this problem. It has been solved by using bundler 1.0.7
instead of 1.0.8…

Thank

But how to downgrade Bundler?
The bugs is reported on Github?

I found it on git

https://github.com/carlhuda/bundler/issuesearch?state=open&q=sanitizer#issue/967