The reasons for the last file failure usually include:

1, the uploaded file format does not meet the requirements.

2. The uploaded file size exceeds the requirements.

3. There was a network problem when uploading.

4. The firewall does not open the permission to upload files.

The specific upload method is as follows:

1. Enter Shandong Cloud Education Service Platform on Baidu, find its official website, and click Enter.

2. The page jumps to Shandong Cloud Education Service Platform, enter your account number and password on the right, and click Login.

3. After the page jumps, log in to Shandong Cloud Education Service Platform. You can see multiple functional modules in the login background. Click the Add button under Social Practice.

4. Enter relevant social practice activities in the social practice activities filling page that appears.

5. Drop down the social practice information editing page, and you can see the Select File button below the proof materials. Click this button.

6. Select the picture to upload in the file selection dialog box that pops up, and click the Open button.

7. After the progress of uploading pictures is completed, click the upload button at the back. At this point, you can see that the picture has been uploaded successfully. Click the Save button to complete the uploading of social practice photos.