cannot access com.fasterxml.jackson.core.ObjectCodec

I am running into a problem in Intellij IDEA 2018.1.5. Running on Debian Jessie.

I have a Java Spring project with a pom.xml file and I can successfully do both 'mvn clean' and 'mvn compile' on the command line and get no errors. I can also run these same commands through the Intellij Maven UI.

However, in Intellij, the editor complains "cannot access com.fasterxml.jackson.core.ObjectCodec" on the 'asset = jackson.readValue' line

 ObjectMapper jackson = null;
 CcBoAsset asset = null;
 BoMailRoomAssociate user = null; 
 InterfaceBs service = null;
 String objAsJson = null;

 //
 jackson = new ObjectMapper();
 logger.info ("inJson = " + inJson);
 
 try
 {
 //
 asset = jackson.readValue(inJson, CcBoCleveronAsset.class);
 logger.info ("assetId = " + asset.getAssetId() );
 logger.info ("clientName = " + asset.getClientName() );
 logger.info ("hStatus = " + asset.getHStatus() );
 
 //objAsJson = mapper.writeValueAsString(user);
 }
 catch (Exception e)
 

Should I just ignore this error?

Is there a way to clear it?

I have deleted the ~/.m2 directory and let maven rebuild it but that did not change anything.