Add Error Handling when upload folder is empty

PixelfedImporter.py

@@ -104,6 +104,8 @@ def createNewPost(access_token, url, ImageID, ImageDescription):
 
 def sendImages(Token, url, imagedir, uploadType, deleteFile):
     files = getImages(imagedir)
+    if not files:
+        raise ValueError("No file found.")
     tags = getTags("tags.txt")
     tagDescription = ""
     newFileID = ""
@@ -141,4 +143,7 @@ if __name__ == "__main__":
     uploadType = config.get("upload_type")
     deleteFile = config.get("delete_file")
     
-    sendImages(accessToken, url, imagedir, uploadType, deleteFile)
+    try:
+        sendImages(accessToken, url, imagedir, uploadType, deleteFile)
+    except ValueError as e:
+        print(f"Error while uploading the image: {e}")