support non url task block (#3983)

skyvern/forge/agent.py

@@ -47,7 +47,6 @@ from skyvern.exceptions import (
     FailedToTakeScreenshot,
     InvalidTaskStatusTransition,
     InvalidWorkflowTaskURLState,
-    MissingBrowserState,
     MissingBrowserStatePage,
     NoTOTPVerificationCodeFound,
     ScrapingFailed,
@@ -174,9 +173,7 @@ class ForgeAgent:
             browser_state = app.BROWSER_MANAGER.get_for_workflow_run(
                 workflow_run_id=workflow_run.workflow_run_id, parent_workflow_run_id=workflow_run.parent_workflow_run_id
             )
-            if browser_state is None:
-                raise MissingBrowserState(workflow_run_id=workflow_run.workflow_run_id)
-
+            if browser_state is not None:
                 working_page = await browser_state.get_working_page()
                 if not working_page:
                     LOG.error(
@@ -189,6 +186,9 @@ class ForgeAgent:
                     raise InvalidWorkflowTaskURLState(workflow_run.workflow_run_id)
 
                 task_url = working_page.url
+            else:
+                LOG.info("No browser state found for workflow run, setting task url to empty string")
+                task_url = ""
 
         task = await app.DATABASE.create_task(
             url=task_url,