Please always include the link to the page or post or backend screen where the issue is replicable.
If Forms, Views, or Fields are involved, a link to those would help us to determine the issue as well.
A description of what happens is also helpful since there might be several things "not working" with Image Uploads.
For example, the user cannot see the upload field, or they can see it but it doesn't do anything when clicking, or there are errors after upload, etc.
Right now I see you have only one post-Form hidden link
That Form features at least 3 upload opportunities, being Featured Image; photos2 (assumed to be an Image Field) and WYSIWYG Upload Media if present.
I assume you refer to this page hidden link (hidden link) where the user shall use the Form.
On that Page, I can upload images just fine on my MacBook, however, I see AJAX uploads are disabled.
Hence, without submitting that form (which I am not sure to be allowed), I cannot confirm whether or not the image is added.
Also, I see the repeating field (add new) is not working, when clicked, nothing happens.
There are 2 errors in the console:
ReferenceError: Can't find variable: jQuery
<em><u>hidden link</u></em>
TypeError: undefined is not a function (near '...).mediaelementplayer(c)}var c={};return{...')
<em><u>hidden link</u></em>
These errors are not due to Toolset, they seem due to Theme or other software. I would as first recommend disabling any software unless Toolset and test again (on a testing site).
On an iPad, the exact same as above described on MacBook happens, I can add the images but I am not sure whether they are saved or not as I cannot submit the form without clear permission to do so, and also I cannot add more than one repeating image.
Can you clarify what error you mean and the steps to replicate it, as well as provide permission to submit test content (which is public) or a testing site where I can try this again?
Note that locally on a Fresh Toolset Install none of the issues I see on your install is replicable, which points to conflicts with other plugins or the theme.