Voice over built app not working on iphone after Ring Central upgrade was completed

There was an upgrade made by Ring Central and now the Ring Central mobile app has an issue because the operating system on her iphone (which is newer) isn't interfacing with the Ring Central app anymore. What this means is the voice-over feature isn't highlighting where the cursor is on the app anymore so my co worker can't use her mobile phone to receive or send calls through Ring Central anymore. This feature was working before the update was made and now the app is not accessible.