White Screen display after upgrade@janbonne

Hi,

After performing an update/upgrade according to the GitHub - jbaans/iothermostat: Independent Open-source Thermostat documentation without encountering any particular error, the iothermostat display shows a completely blank page.

access to the web page http://192.168.1.22/iothermostat/index.php is correct and functional

If you touch the screen (blind), actions on temperature, for example, are taken into account.

Have you encountered this problem?

thank you for your advice

Sincerely