I have tried everything I am not sure what the issue is
I have checked the resources folder and all the images (STIMULI) are there and in the main folder.
I have checked and applied the solutions to the other unknown resource errors in the forum but I keep getting the same error message
Hello!
I was wondering whether you managed to solve your issue, since I am running into the same one. I was hoping to find advice on the forum 
Never mind, I just did by moving all the stimuli and stimulus files into the html folder!