Having issues with web build

[safrant]

The core and program build successfully, but the web gives the following:

Task :compileJava
Note: Some input files use unchecked or unsafe operations.
Note: Recompile with -Xlint:unchecked for details.

Task :frontend:npm_install
up to date in 4.758s

Task :frontend:build FAILED

[email protected] build:prod /Users/safrant/git/safrant-sparql-report-writer/web/frontend
ng build --prod --base-href /ncreportwriter/ && npm run copyAll

/Users/safrant/git/safrant-sparql-report-writer/web/frontend/node_modules/@ngtools/json-schema/src/schema-tree.js:226
this._children[name] = this._createChildProperty(name, value ? value[name] : undefined, forward ? forward.children[name] : null, propertySchema);
^

TypeError: Cannot read property 'glob' of null
at ObjectSchemaTreeNode._set (/Users/safrant/git/safrant-sparql-report-writer/web/frontend/node_modules/@ngtools/json-schema/src/schema-tree.js:226:132)
at new ObjectSchemaTreeNode (/Users/safrant/git/safrant-sparql-report-writer/web/frontend/node_modules/@ngtools/json-schema/src/schema-tree.js:211:14)
at OneOfSchemaTreeNode._createChildProperty (/Users/safrant/git/safrant-sparql-report-writer/web/frontend/node_modules/@ngtools/json-schema/src/schema-tree.js:150:26)
at OneOfSchemaTreeNode._typesPrototype.schema.oneOf.map (/Users/safrant/git/safrant-sparql-report-writer/web/frontend/node_modules/@ngtools/json-schema/src/schema-tree.js:163:25)
at Array.map ()
at OneOfSchemaTreeNode (/Users/safrant/git/safrant-sparql-report-writer/web/frontend/node_modules/@ngtools/json-schema/src/schema-tree.js:162:48)
at ArraySchemaTreeNode._createChildProperty (/Users/safrant/git/safrant-sparql-report-writer/web/frontend/node_modules/@ngtools/json-schema/src/schema-tree.js:150:26)
at ArraySchemaTreeNode._set (/Users/safrant/git/safrant-sparql-report-writer/web/frontend/node_modules/@ngtools/json-schema/src/schema-tree.js:288:39)
at new ArraySchemaTreeNode (/Users/safrant/git/safrant-sparql-report-writer/web/frontend/node_modules/@ngtools/json-schema/src/schema-tree.js:269:14)
at ObjectSchemaTreeNode._createChildProperty (/Users/safrant/git/safrant-sparql-report-writer/web/frontend/node_modules/@ngtools/json-schema/src/schema-tree.js:150:26)
npm ERR! code ELIFECYCLE
npm ERR! errno 1
npm ERR! [email protected] build:prod: ng build --prod --base-href /ncreportwriter/ && npm run copyAll
npm ERR! Exit status 1
npm ERR!
npm ERR! Failed at the [email protected] build:prod script.
npm ERR! This is probably not a problem with npm. There is likely additional logging output above.

npm ERR! A complete log of this run can be found in:
npm ERR! /Users/safrant/.npm/_logs/2018-03-05T20_47_03_787Z-debug.log

FAILURE: Build failed with an exception.

• What went wrong:
  Execution failed for task ':frontend:build'.

Process 'command '/Users/safran/git/safrant-sparql-report-writer/web/frontend/.gradle/npm/npm-v5.6.0/bin/npm'' finished with non-zero exit value 1

• Try:
  Run with --stacktrace option to get the stack trace. Run with --info or --debug option to get more log output.

• Get more help at https://help.gradle.org

BUILD FAILED in 7s
6 actionable tasks: 4 executed, 2 up-to-date