diff --git a/src/cpl_cli/configuration/build_settings.py b/src/cpl_cli/configuration/build_settings.py
index 167db345..37e3662a 100644
--- a/src/cpl_cli/configuration/build_settings.py
+++ b/src/cpl_cli/configuration/build_settings.py
@@ -76,7 +76,11 @@ class BuildSettings(ConfigurationModelABC):
             self._included = settings[BuildSettingsNameEnum.included.value]
             self._excluded = settings[BuildSettingsNameEnum.excluded.value]
             self._package_data = settings[BuildSettingsNameEnum.package_data.value]
-            self._project_references = settings[BuildSettingsNameEnum.project_references.value]
+
+            if BuildSettingsNameEnum.project_references.value in settings:
+                self._project_references = settings[BuildSettingsNameEnum.project_references.value]
+            else:
+                self._project_references = []
 
             if sys.platform == 'win32':
                 self._source_path = str(self._source_path).replace('/', '\\')
diff --git a/src/cpl_cli/configuration/project_settings.py b/src/cpl_cli/configuration/project_settings.py
index d9e8413b..3f8f0fcc 100644
--- a/src/cpl_cli/configuration/project_settings.py
+++ b/src/cpl_cli/configuration/project_settings.py
@@ -127,7 +127,11 @@ class ProjectSettings(ConfigurationModelABC):
 
             self._python_executable = path
 
-            self._classifiers = settings[ProjectSettingsNameEnum.classifiers.value]
+            if ProjectSettingsNameEnum.classifiers.value:
+                self._classifiers = settings[ProjectSettingsNameEnum.classifiers.value]
+            else:
+                self._classifiers = []
+
         except Exception as e:
             Console.set_foreground_color(ForegroundColorEnum.red)
             Console.write_line(
diff --git a/src/cpl_cli/configuration/workspace_settings.py b/src/cpl_cli/configuration/workspace_settings.py
index 2b358218..4d51736a 100644
--- a/src/cpl_cli/configuration/workspace_settings.py
+++ b/src/cpl_cli/configuration/workspace_settings.py
@@ -31,7 +31,11 @@ class WorkspaceSettings(ConfigurationModelABC):
         try:
             self._default_project = settings[WorkspaceSettingsNameEnum.default_project.value]
             self._projects = settings[WorkspaceSettingsNameEnum.projects.value]
-            self._scripts = settings[WorkspaceSettingsNameEnum.scripts.value]
+
+            if WorkspaceSettingsNameEnum.scripts.value in settings:
+                self._scripts = settings[WorkspaceSettingsNameEnum.scripts.value]
+            else:
+                self._scripts = {}
         except Exception as e:
             Console.error(f'[ ERROR ] [ {__name__} ]: Reading error in {self.__name__} settings')
             Console.error(f'[ EXCEPTION ] [ {__name__} ]: {e} -> {traceback.format_exc()}')
diff --git a/src/tests/custom/general/src/general/general.json b/src/tests/custom/general/src/general/general.json
index 8c2aee2a..6bed03dd 100644
--- a/src/tests/custom/general/src/general/general.json
+++ b/src/tests/custom/general/src/general/general.json
@@ -16,7 +16,7 @@
     "LicenseName": "MIT",
     "LicenseDescription": "MIT, see LICENSE for more details.",
     "Dependencies": [
-      "sh_cpl==2021.4.dev1"
+      "sh_cpl==2021.4.0.post2"
     ],
     "PythonVersion": ">=3.8",
     "PythonPath": {
@@ -40,6 +40,7 @@
       "*/logs",
       "*/tests"
     ],
-    "PackageData": {}
+    "PackageData": {},
+    "ProjectReferences": []
   }
 }
\ No newline at end of file