Please help us help you and fill where relevant:
Your LimeSurvey version: [see right hand bottom of your LimeSurvey admin screen]
Own server or LimeSurvey hosting: MAX Survey/LimeSurvey
Survey theme/template:Fruity Theme ( fruity)
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My issue and follow-on question is related to the "File upload" question. 

Issue: I am going through my survey and after uploading a file, the window just responds with the following. It does not return to the survey or present a "Next" button to allow me to continue on. If I refresh the screen, it brings me back to my question and prompts for the upload.....{ "success":true,"size":57.4755859375,"name":"Agile-task-board.jpg","ext":"jpg","filename":"futmp_mrbwsya45mq7sgp_jpg","msg":"The file has been successfully uploaded." }. 

Question: How do I add a .docx attachment to a particular question in my survey? I want to add the attachment so participants can download, complete a task, and then upload (supports the "file upload"  question above). I added the file to the "resources" area. To make long story short, the attachment contains the instructions and the paper-based data collection tool/research instrument. I am just using the LimeSurvey to collect/aggregate demographic information.

You did not mention the Limesurvey of your installation.

To add a Word document for download, you just need to create a link to the documento, just with any other file.

LimeSurvey Cloud
Version 5.3.25

Thank you. For those who may have the same question...I clicked 'link \ protocol \ other \ browse server' and selected the file that I previously uploaded under the 'resources' section on the survey menu. Would still love any input on my file upload error.  .
 

Hi,
I just tested in the LimeSurvey hosted version 5.3.25.

1.1. Offer a docx file to download.
(This file was uploaded to a directory of my server)
 

1.2. Download the file
 
  
2.1. Upload the file again
 
  


2.2. The "summary" page 
 

2.3. The file in the answer table
 
  
So I do not see an issue.

By the way: What is "MAX Survey"?

Joffm