The temporary glitch between the Steam client and its servers may be causing the ‘image failed to upload’ issue. Solution 2: Logout and Log Back into the Steam Client Then relaunch the Steam client and check if the images can be uploaded to Steam.Now, in the menu shown, click on Check for Steam Client Updates and if an update is available, apply the update.
In this context, updating the Steam client to the latest release may solve the problem. The Steam client may fail to upload images to the servers if its installation is outdated as it can create incompatibility between the client and server. Solution 1: Update the Steam Client to the Latest Release Furthermore, check if uploading the image at the business time of Seattle Valve HQ (not at night time) solves the issue. Moreover, make sure you are not running out of space on the Steam server. Also, check if uploading a different image lets you upload (if so, then the problem is with the image). Before moving on with the solutions, check if retrying to upload the image 4-5 times (you may click and hold the Upload button, just not click) clears out the issue.