diff --git a/crates/service/web/storyteller_web/src/docs/api_doc.rs b/crates/service/web/storyteller_web/src/docs/api_doc.rs
index f92f637378..43b2d184a5 100644
--- a/crates/service/web/storyteller_web/src/docs/api_doc.rs
+++ b/crates/service/web/storyteller_web/src/docs/api_doc.rs
@@ -676,7 +676,6 @@ use crate::http_server::endpoints::media_files::list::list_batch_generated_redux
     DeleteWeightError,
     DeleteWeightPathInfo,
     DeleteWeightRequest,
-    DismissFinishedSessionJobsError,
     DismissFinishedSessionJobsSuccessResponse,
     EditBetaKeyDistributedFlagError,
     EditBetaKeyDistributedFlagPathInfo,
diff --git a/crates/service/web/storyteller_web/src/http_server/common_responses/common_web_error.rs b/crates/service/web/storyteller_web/src/http_server/common_responses/common_web_error.rs
index e151b63521..8a7e8e6954 100644
--- a/crates/service/web/storyteller_web/src/http_server/common_responses/common_web_error.rs
+++ b/crates/service/web/storyteller_web/src/http_server/common_responses/common_web_error.rs
@@ -1,9 +1,10 @@
 use actix_http::StatusCode;
 use actix_web::{HttpResponse, HttpResponseBuilder, ResponseError};
-use log::error;
+use log::{error, warn};
 use mysql_queries::errors::mysql_error::{MysqlCrateErrorSubtype, MysqlError};
 use std::error::Error;
 use std::fmt::{Display, Formatter};
+use crate::http_server::web_utils::user_session::require_user_session::RequireUserSessionError;
 
 #[derive(Debug, utoipa::ToSchema)]
 pub enum CommonWebError {
@@ -99,6 +100,15 @@ impl <T: MysqlCrateErrorSubtype> From<MysqlError<T>> for CommonWebError {
   }
 }
 
+impl From<RequireUserSessionError> for CommonWebError {
+  fn from(value: RequireUserSessionError) -> Self {
+    match value {
+      RequireUserSessionError::NotAuthorized => Self::NotAuthorized,
+      RequireUserSessionError::ServerError => Self::ServerError,
+    }
+  }
+}
+
 #[cfg(test)]
 mod tests {
   use super::*;
diff --git a/crates/service/web/storyteller_web/src/http_server/endpoints/inference_job/delete/dismiss_finished_session_jobs_handler.rs b/crates/service/web/storyteller_web/src/http_server/endpoints/inference_job/delete/dismiss_finished_session_jobs_handler.rs
index fb3c3e0970..5c3a6dffa8 100644
--- a/crates/service/web/storyteller_web/src/http_server/endpoints/inference_job/delete/dismiss_finished_session_jobs_handler.rs
+++ b/crates/service/web/storyteller_web/src/http_server/endpoints/inference_job/delete/dismiss_finished_session_jobs_handler.rs
@@ -1,16 +1,13 @@
-use std::fmt;
 use std::sync::Arc;
 
-use actix_web::error::ResponseError;
-use actix_web::http::StatusCode;
-use actix_web::{web, HttpMessage, HttpRequest, HttpResponse};
-use log::{error, warn};
+use actix_web::{web, HttpMessage, HttpRequest};
+use actix_web::web::Json;
+use log::error;
 use utoipa::ToSchema;
 
 use mysql_queries::queries::generic_inference::web::dismiss_finished_jobs_for_user::dismiss_finished_jobs_for_user;
-use mysql_queries::queries::generic_inference::web::mark_generic_inference_job_cancelled_by_user::mark_generic_inference_job_cancelled_by_user;
 
-use crate::http_server::web_utils::response_error_helpers::to_simple_json_error;
+use crate::http_server::common_responses::common_web_error::CommonWebError;
 use crate::http_server::web_utils::user_session::require_user_session::require_user_session;
 use crate::state::server_state::ServerState;
 
@@ -19,40 +16,6 @@ pub struct DismissFinishedSessionJobsSuccessResponse {
   pub success: bool,
 }
 
-#[derive(Debug, ToSchema)]
-pub enum DismissFinishedSessionJobsError {
-  ServerError,
-  NotFound,
-  NotAuthorized,
-}
-
-impl ResponseError for DismissFinishedSessionJobsError {
-  fn status_code(&self) -> StatusCode {
-    match *self {
-      DismissFinishedSessionJobsError::ServerError => StatusCode::INTERNAL_SERVER_ERROR,
-      DismissFinishedSessionJobsError::NotFound => StatusCode::NOT_FOUND,
-      DismissFinishedSessionJobsError::NotAuthorized => StatusCode::UNAUTHORIZED,
-    }
-  }
-
-  fn error_response(&self) -> HttpResponse {
-    let error_reason = match self {
-      Self::ServerError => "server error".to_string(),
-      Self::NotFound => "not found".to_string(),
-      Self::NotAuthorized => "unauthorized".to_string(),
-    };
-
-    to_simple_json_error(&error_reason, self.status_code())
-  }
-}
-
-// NB: Not using derive_more::Display since Clion doesn't understand it.
-impl fmt::Display for DismissFinishedSessionJobsError {
-  fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
-    write!(f, "{:?}", self)
-  }
-}
-
 /// Mark all jobs that are finished (or that failed completely and will not retry) as dismissed.
 ///
 /// This will prevent these jobs from being returned in the "list session jobs" endpoint.
@@ -62,46 +25,33 @@ impl fmt::Display for DismissFinishedSessionJobsError {
   path = "/v1/jobs/session/dismiss_finished",
   responses(
     (status = 200, body = DismissFinishedSessionJobsSuccessResponse),
-    (status = 500, body = DismissFinishedSessionJobsError),
+    (status = 401, body = CommonWebError),
+    (status = 500, body = CommonWebError),
   ),
 )]
 pub async fn dismiss_finished_session_jobs_handler(
   http_request: HttpRequest,
-  server_state: web::Data<Arc<ServerState>>) -> Result<HttpResponse, DismissFinishedSessionJobsError>
+  server_state: web::Data<Arc<ServerState>>) -> Result<Json<DismissFinishedSessionJobsSuccessResponse>, CommonWebError>
 {
+  let user_session = require_user_session(&http_request, &server_state)
+      .await?;
+
   // TODO(bt,2024-06-16): Reuse connection
   let mut mysql_connection = server_state.mysql_pool.acquire()
       .await
       .map_err(|e| {
-        warn!("Could not acquire DB pool: {:?}", e);
-        DismissFinishedSessionJobsError::ServerError
-      })?;
-
-  let user_session = require_user_session(&http_request, &server_state)
-      .await
-      .map_err(|e| {
-        warn!("Session checker error: {:?}", e);
-        DismissFinishedSessionJobsError::ServerError
+        error!("Could not acquire DB pool: {:?}", e);
+        CommonWebError::ServerError
       })?;
 
   dismiss_finished_jobs_for_user(&mut mysql_connection, &user_session.user_token)
       .await
       .map_err(|err| {
         error!("tts job query error: {:?}", err);
-        DismissFinishedSessionJobsError::ServerError
+        CommonWebError::ServerError
       })?;
 
-  let response = DismissFinishedSessionJobsSuccessResponse {
+  Ok(Json(DismissFinishedSessionJobsSuccessResponse {
     success: true,
-  };
-
-  let body = serde_json::to_string(&response)
-      .map_err(|e| {
-        error!("error returning response: {:?}",  e);
-        DismissFinishedSessionJobsError::ServerError
-      })?;
-
-  Ok(HttpResponse::Ok()
-      .content_type("application/json")
-      .body(body))
+  }))
 }