Project Slider Images won't load

We are trying to update our website with new portfolio items and cannot get the images to upload. Once I click the images from my files that I want to upload nothing happens and no images are inserted into project slides box. I have reviewed other forum posts in this and have followed the steps to no avail. I do not know enough about this website stuff to understand all of the codes and short forms being used in the other forum- I need a simple and to the point explanation as to how to fix this. We do have the theme version up to date.

Thanks

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