[Lizmap] exploit expressions from QGIS forms

[LionelB]

Dear list
I'd like to exploit expressions from QGIS forms as mentioned here
https://www.3liz.com/blog/rldhont/index.php?post/2020/11/24/Evaluer-les-Expresions-QGIS-c%C3%B4t%C3%A9-serveur-avec-le-Plugin-Lizmap

I've installed
- the latest lwc 3.4.4
- lizmap plugin on my server

I can send this query :
http://qgisserver//cgi-bin/qgis_mapserv.fcgi?service=LIZMAP&request=GetServerSettings&map=myproject.qgs
And this I obtain :
{"qgis": {"version": "3.18.1", "name": "Z\u00fcrich", "version_int":
31801}, "gdalogr": {"name": "GDAL 2.4.0, released 2018/12/14",
"version_int": "2040000"}, "services": ["WMS", "WFS", "WCS", "WMTS",
"EXPRESSION", "LIZMAP"], "lizmap": {"name": "Lizmap", "version": "master"}}
It seems ok.
I published a project with visibility controls in qgis forms, but I don't
see any effect in LWC form.
Did I miss something?

Thanks
Lionel
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