I have installed the QGIS Web Client from git with the install.sh script and went directly to copy a QIS project in the project directory (with map layers in Postgis). After struggling with CRS (in the end I needed to set the project to 3857 when my layers are in 4326) and configuring properly the OWS properties I could obtain a nice result. However, I am not able to select/deselect map layers neither to use "Layer Order".

Testing many settings I realized that I cannot even have the examples "Hello World" and "Natural Earth" working at all even after a re-install. The former just shows OSM and the latter is stuck on "Loading Map".

I can't figure out what is wrong even looking at the information given in the log.