Ok. Retried it changing the settings in the config like that:
{
"Position": "0.745 0.05",
"Color ON": "0.55 0.78 0.24 1",
"Color OFF": "0.8 0.28 0.2 1",
"Text size": 15,
"Text color": "1 1 1 1",
"Show message on placement": true,
"Bypass decay damage": true,
"Enabled by default"...