Resource not found when compiling on CM13/Android M

I added UnifiedNLP to my CM13 build, synced and get the following errors. Does anyone know how this can be fixed?

packages/apps/UnifiedNlp/unifiednlp-base/src/main/res/layout/settings_activity.xml:22: error: Error: No resource found that matches the given name (at 'layout' with value '@layout/toolbar').

packages/apps/UnifiedNlp/unifiednlp-base/src/main/res/xml/nlp_setup_preferences.xml:20: error: Error: No resource found that matches the given name (at 'title' with value '@string/prefcat_setup').

packages/apps/UnifiedNlp/unifiednlp-base/src/main/res/xml/nlp_setup_preferences.xml:21: error: Error: No resource found that matches the given name (at 'key' with value '@string/self_check_title').

packages/apps/UnifiedNlp/unifiednlp-base/src/main/res/xml/nlp_setup_preferences.xml:21: error: Error: No resource found that matches the given name (at 'summary' with value '@string/self_check_desc').

packages/apps/UnifiedNlp/unifiednlp-base/src/main/res/xml/nlp_setup_preferences.xml:21: error: Error: No resource found that matches the given name (at 'title' with value '@string/self_check_title').
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Start by reproducing the CM13/Android M build and inspect packages/apps/UnifiedNlp/unifiednlp-base/src/main/res/layout/settings_activity.xml and res/xml/nlp_setup_preferences.xml. Trace the missing toolbar and string resources, then verify that the UnifiedNlp build completes without these resource errors.

Written by the indexing model from the issue text.