Ok, so I looked in to CoherentUI and it’s quite the package - with quite the price tag to boot. As an solo indie I can tell you I definitely do not have $3,500 dollars to spend on a plug-in, but I have the time to try and figure out the install of a free one like - if others have found ways to make it work I could sure use a small nudge in the right direction…
@ you said that you successfully created and tested a project inside the editor - my guess would be that you need that Qt5Webkit.dll in the same directory or path as the exe for your build for it to work. Similar to missing directX dll errors you run across when installing older games sometimes. Likely if it worked inside of the editor then the .dll you are looking for is also within the Unreal resources folders you used to create the project somewhere and file search should find it for you.
Hopefully helps, but I also have a question for you: Which UE4 build are you using and what steps did you take to get the plug-in to work? Any help or tips would certainly be appreciated…