Such problems are usually caused by the social media platform you are downloading from.
Below we have listed 2 possibilities that we uncovered from the problems experienced by some users:
1- The video you are trying to download or save to your device has been disabled by the user.
2- Since the video you are trying to download or save to your device contains copyright by the social media platform, it has been blocked for download to protect the rights of this video.
Dear users, if you experience any problems other than these situations, please report these technical problems to us as a comment below or in the contact section. Unless problems are reported, service quality will decrease.