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Knowledge Base
Semrush Toolkits
Social Media
Social Media Poster
Troubleshooting Social Media Poster publishing errors

Troubleshooting Social Media Poster publishing errors

Issues with publishing posts on Social Media Poster fall into two main categories:

1. Issues related to media content included in the post (i.e. image/video size).

In cases like this, there is usually a descriptive error message: “Cannot upload media. Please provide a smaller version of images or select another file.” or something similar prompting you to change the image/video you are trying to upload. 

In general, we support uploading images up to 20 MB, but different social media platforms have different requirements and restrictions. For easier editing, Social Media Poster will resize your image in accordance with the requirements of the social network you choose automatically. You will see the alert only if the compressed image is still more than required. 

Maximum video size is 600 MB. If your video doesn’t satisfy the aspect ratio requirements, Social Media Poster will adjust it by adding black bars on the top and bottom or on the left and right sides of the video depending on if it’s horizontal or vertical.

Below you can find information on image and video requirements by different platforms, so you can adjust your image/video accordingly, if needed.

  • Supported formats: mp4 and mov
  • The aspect ratio of the video should be between 9x16 and 16x9

For Image posting:

  • up to 10 photos or videos per post
  • Supported format: JPEG
  • Aspect ratio: Must be within a 4:5 to 1.91:1 range
  • Minimum width: 320
  • Maximum width: 1440
  • Height: Varies, depending on width and aspect ratio
  • Max size: 8 MB

For Video posting:

  • Supported formats: mp4 and mov
  • The aspect ratio of the video should be between 9x16 and 16x9
  • Max Video length: 60 sec
Max 9 images per post (up to 2 MB each) or 1 video.

Video posting:
  • Supported formats: mp4 and mov
  • The aspect ratio of the video should be between 9x16 and 16x9
  • Min/max video duration: 3 sec/10 min.
  • Video Resolution: 256x144 to 4096x2304 px
Images: Max 4 images (up to 3 MB each) or 1 GIF (up to 20 MB)

Video: 
  • Supported formats: mp4 and mov
  • The aspect ratio of the video should be between 9x16 and 16x9
  • Max Video length: 140 sec

2. General errors related to connection issues.

If you get a general error message, for example “Couldn’t publish this post due to an unknown error”, most likely there is a problem with the connection or permissions.

To resolve this issue, please try disconnecting your profile (remove the integration on your profile’s side too) and then connecting it again. Make sure that you are allowing all of the permissions we ask.