diff --git a/pages/src/problems.md b/pages/src/problems.md
index 4db7375eccd3f9ac9a29ef8b1657e3fa3ab530d4..fef57ff5abf75682c95aef6f2deeae69af083558 100644
--- a/pages/src/problems.md
+++ b/pages/src/problems.md
@@ -1,4 +1,11 @@
 # Frequent Problems
 
-Nothing yet...
 
+## The online Jupyter does not execute the notebooks
+
+We are using a WebAssembly implementation of Jupyter to avoid having to manage a server.
+However, the WebAssembly technology is still young, and the version your browser might not be recent enough to run it. 
+
+Either you update your browser, or the simplest solution would be to download the notebooks and execute them on your own Jupyter instance.
+
+Download the notebooks [here](https://gitlab.inria.fr/control-for-computing/jupyter/-/jobs/artifacts/master/raw/notebooks_tuto_ctrl.zip?job=archive_notebooks)