diff --git a/api/factories/file_factory.py b/api/factories/file_factory.py
index 69fd1a6da3..735fff53d1 100644
--- a/api/factories/file_factory.py
+++ b/api/factories/file_factory.py
@@ -64,7 +64,10 @@ def build_from_mapping(
     config: FileUploadConfig | None = None,
     strict_type_validation: bool = False,
 ) -> File:
-    transfer_method = FileTransferMethod.value_of(mapping.get("transfer_method"))
+    transfer_method_value = mapping.get("transfer_method")
+    if not transfer_method_value:
+        raise ValueError("transfer_method is required in file mapping")
+    transfer_method = FileTransferMethod.value_of(transfer_method_value)
 
     build_functions: dict[FileTransferMethod, Callable] = {
         FileTransferMethod.LOCAL_FILE: _build_from_local_file,
@@ -104,6 +107,8 @@ def build_from_mappings(
 ) -> Sequence[File]:
     # TODO(QuantumGhost): Performance concern - each mapping triggers a separate database query.
     # Implement batch processing to reduce database load when handling multiple files.
+    # Filter out None/empty mappings to avoid errors
+    valid_mappings = [m for m in mappings if m and m.get("transfer_method")]
     files = [
         build_from_mapping(
             mapping=mapping,
@@ -111,7 +116,7 @@ def build_from_mappings(
             config=config,
             strict_type_validation=strict_type_validation,
         )
-        for mapping in mappings
+        for mapping in valid_mappings
     ]
 
     if (
diff --git a/web/app/components/share/text-generation/result/index.tsx b/web/app/components/share/text-generation/result/index.tsx
index 7a4e606636..57c22ea1bf 100644
--- a/web/app/components/share/text-generation/result/index.tsx
+++ b/web/app/components/share/text-generation/result/index.tsx
@@ -20,7 +20,9 @@ import type { SiteInfo } from '@/models/share'
 import { TEXT_GENERATION_TIMEOUT_MS } from '@/config'
 import {
   getFilesInLogs,
+  getProcessedFiles,
 } from '@/app/components/base/file-uploader/utils'
+import type { FileEntity } from '@/app/components/base/file-uploader/types'
 import { formatBooleanInputs } from '@/utils/model-config'
 
 export type IResultProps = {
@@ -160,8 +162,22 @@ const Result: FC<IResultProps> = ({
     if (!checkCanSend())
       return
 
+    // Process inputs: convert file entities to API format
+    const processedInputs = { ...formatBooleanInputs(promptConfig?.prompt_variables, inputs) }
+    promptConfig?.prompt_variables.forEach((variable) => {
+      const value = processedInputs[variable.key]
+      if (variable.type === 'file' && value && typeof value === 'object' && !Array.isArray(value)) {
+        // Convert single file entity to API format
+        processedInputs[variable.key] = getProcessedFiles([value as FileEntity])[0]
+      }
+      else if (variable.type === 'file-list' && Array.isArray(value) && value.length > 0) {
+        // Convert file entity array to API format
+        processedInputs[variable.key] = getProcessedFiles(value as FileEntity[])
+      }
+    })
+
     const data: Record<string, any> = {
-      inputs: formatBooleanInputs(promptConfig?.prompt_variables, inputs),
+      inputs: processedInputs,
     }
     if (visionConfig.enabled && completionFiles && completionFiles?.length > 0) {
       data.files = completionFiles.map((item) => {
diff --git a/web/app/components/share/text-generation/run-once/index.tsx b/web/app/components/share/text-generation/run-once/index.tsx
index 4f94aa1fe8..d24428f32a 100644
--- a/web/app/components/share/text-generation/run-once/index.tsx
+++ b/web/app/components/share/text-generation/run-once/index.tsx
@@ -15,7 +15,6 @@ import { DEFAULT_VALUE_MAX_LEN } from '@/config'
 import TextGenerationImageUploader from '@/app/components/base/image-uploader/text-generation-image-uploader'
 import type { VisionFile, VisionSettings } from '@/types/app'
 import { FileUploaderInAttachmentWrapper } from '@/app/components/base/file-uploader'
-import { getProcessedFiles } from '@/app/components/base/file-uploader/utils'
 import useBreakpoints, { MediaType } from '@/hooks/use-breakpoints'
 import cn from '@/utils/classnames'
 import BoolInput from '@/app/components/workflow/nodes/_base/components/before-run-form/bool-input'
@@ -82,9 +81,9 @@ const RunOnce: FC<IRunOnceProps> = ({
       else if (item.type === 'checkbox')
         newInputs[item.key] = item.default || false
       else if (item.type === 'file')
-        newInputs[item.key] = item.default
+        newInputs[item.key] = undefined
       else if (item.type === 'file-list')
-        newInputs[item.key] = item.default || []
+        newInputs[item.key] = []
       else
         newInputs[item.key] = undefined
     })
@@ -148,8 +147,8 @@ const RunOnce: FC<IRunOnceProps> = ({
                   )}
                   {item.type === 'file' && (
                     <FileUploaderInAttachmentWrapper
-                      value={inputs[item.key] ? [inputs[item.key]] : []}
-                      onChange={(files) => { handleInputsChange({ ...inputsRef.current, [item.key]: getProcessedFiles(files)[0] }) }}
+                      value={(inputs[item.key] && typeof inputs[item.key] === 'object') ? [inputs[item.key]] : []}
+                      onChange={(files) => { handleInputsChange({ ...inputsRef.current, [item.key]: files[0] }) }}
                       fileConfig={{
                         ...item.config,
                         fileUploadConfig: (visionConfig as any).fileUploadConfig,
@@ -158,8 +157,8 @@ const RunOnce: FC<IRunOnceProps> = ({
                   )}
                   {item.type === 'file-list' && (
                     <FileUploaderInAttachmentWrapper
-                      value={inputs[item.key]}
-                      onChange={(files) => { handleInputsChange({ ...inputsRef.current, [item.key]: getProcessedFiles(files) }) }}
+                      value={Array.isArray(inputs[item.key]) ? inputs[item.key] : []}
+                      onChange={(files) => { handleInputsChange({ ...inputsRef.current, [item.key]: files }) }}
                       fileConfig={{
                         ...item.config,
                         fileUploadConfig: (visionConfig as any).fileUploadConfig,