diff --git a/src/dioptra/restapi/errors.py b/src/dioptra/restapi/errors.py
index ba72c03a5..1ba834aaf 100644
--- a/src/dioptra/restapi/errors.py
+++ b/src/dioptra/restapi/errors.py
@@ -104,3 +104,4 @@ def register_error_handlers(api: Api) -> None:
     v1.queues.errors.register_error_handlers(api)
     v1.tags.errors.register_error_handlers(api)
     v1.users.errors.register_error_handlers(api)
+    v1.workflows.errors.register_error_handlers(api)
diff --git a/src/dioptra/restapi/v1/workflows/errors.py b/src/dioptra/restapi/v1/workflows/errors.py
index c5723ec4a..e482bb05b 100644
--- a/src/dioptra/restapi/v1/workflows/errors.py
+++ b/src/dioptra/restapi/v1/workflows/errors.py
@@ -28,6 +28,10 @@ class JobExperimentDoesNotExistError(Exception):
     """The experiment associated with the job does not exist."""
 
 
+class EntrypointWorkflowValidationIssue(Exception):
+    """The entrypoint workflow yaml has issues."""
+
+
 def register_error_handlers(api: Api) -> None:
     @api.errorhandler(JobEntryPointDoesNotExistError)
     def handle_experiment_job_does_not_exist_error(error):
@@ -39,3 +43,10 @@ def handle_experiment_does_not_exist_error(error):
             "message": "Not Found - The experiment associated with the job does not "
             "exist"
         }, 404
+
+    @api.errorhandler(EntrypointWorkflowValidationIssue)
+    def handle_entrypoint_workflow_validation_error(error):
+        issues = error.args
+        print (issues)
+        message = "\n".join(str(issue) for issue in issues)
+        return {"message": message}, 422
\ No newline at end of file
diff --git a/src/dioptra/restapi/v1/workflows/service.py b/src/dioptra/restapi/v1/workflows/service.py
index 0bffd73b3..deb6ea009 100644
--- a/src/dioptra/restapi/v1/workflows/service.py
+++ b/src/dioptra/restapi/v1/workflows/service.py
@@ -25,6 +25,7 @@
 
 from .lib import package_job_files, views
 from .schema import FileTypes
+from .errors import EntrypointWorkflowValidationIssue
 
 from dioptra.restapi.db import db
 from dioptra.restapi.v1 import utils
@@ -129,7 +130,6 @@ def validate(
         plugins = self._plugin_id_service.get(plugin_ids)
         for plugin in plugins:
             for plugin_file in plugin['plugin_files']:
-                # print(plugin_file.tasks)
                 for task in plugin_file.tasks:
                     input_parameters = task.input_parameters
                     output_parameters = task.output_parameters
@@ -155,16 +155,11 @@ def validate(
             "tasks": tasks,
             "graph": cast(dict[str, Any], yaml.safe_load(task_graph)),
         }
-        print (task_engine_dict)
         valid = is_valid(task_engine_dict)
 
         if valid:
             return {"status": "Success", "valid": valid}
         else:
             issues = validate(task_engine_dict)
-            print(issues)
-            return {
-                "status": "Success", 
-                "valid": valid,
-                # "issues": issues,
-            }
\ No newline at end of file
+            log.debug("Entrypoint workflow validation failed", issues=issues)
+            raise EntrypointWorkflowValidationIssue(issues)
\ No newline at end of file