OTB doxygen search bar don't work for online version

Description

Any research in otb doxygen leads to a blank page, see:

https://www.orfeo-toolbox.org/doxygen/index.html

Steps to reproduce

Describe as precisely as possible how to reproduce the bug. Try to isolate a minimal number of steps. Also describe reproducibility (always, random ...).

Configuration information

OS, OTB version or tag, information related to build (binaries, superbuild, system libs ...)