HELP! Unable to remove/change Image Link URL

Hi, I am new to the forums so I apologize if I have put this in the wrong section. I am using for my non-profits website the theme Calotropis 1.4.1 by itx. I notice that when I attempt to load images to a page it gives me the option to make my Link URL: None, File URL, or Post URL. It also indicates underneath that “Enter a link URL or click above for presets.” The only problem is no matter how many times I click none or type in the URL I want the image to re-direct to, it still links to the Post URL, which is odd because even in the image itself it says it is linking to the File URL. Normally I wouldn’t care about this because with individual images I would just disable the link right in the page editor but now I want to have a scrolling slideshow on my home page that would allow people to click on the images and be re-directed to a page with more information. Please help! My test page is here in case it needs to be viewed. Thank you in advance for any help you can bestow! https://iwasm.org/wp-blog/?page_id=1868&preview=true