I use Knime 5.1.1 and try to write some data in the Neo4j database with the Neo4j Writer Node but I get the error “ERROR Neo4j Writer Execute failed: javax/json/Json”
If I run the same workflow with KNIME 4.7.1 the Neo4j Writer Node executes without errors and the data is in the database.
In both the 4.7.1 and 5.1.1. KNIME version the Neo4j extension version is 1.0.1.v202207061143
In both versions of KNIME the Neo4j Connection Mode connects to the database without errors
As I person who is engaged with this extension I can tell, that we are aware of this issue. So unfortunately the only suggestion I have for you now is to use Knime 4.7.*.
We are planning to update these nodes until the end of the year, so they will be compatible with version 5.