I have fixed thanks.
The problem was in the cache.xml file
It was failing the XSD validation due to the fact that I had:
<infinispan>
instead of having
<infinispan
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="urn:infinispan:config:4.0 http://www.infinispan.org/schemas/infinispan-config-4.0.xsd"
xmlns="urn:infinispan:config:4.0">
now it works like a charm.
Cheers,
Luca