Crow_ck:
Your guidance led me to find my issue - I had not added a photo of the printed lithophane as a “web / app cover”. I did not know what one was and so left it blank. In review of red asterisks I realized I needed it.
I set up my camera and took the shot, pasted it into the provided location.
I double checked all other red asterisks to be sure they were filled out, submitted the application and it was accepted. After a short wait (~1 hr.) it was approved and showed up when I searched for it.
I then entered it in the Valentines Contest and it showed up there, too! Success.
For a Newbie, I found that process complex mostly because I am not familiar with all the jargon, and tech terms associated with Bambu Labs and 3d printing in general. I wonder if there is a “walk-thru” to help people like me located somewhere (forum, Wiki, other) that I missed in my looking for answers.
If not, I think it might be a valuable assist for others.
In any case, I went back and checked the “Solution” box on your response to my plea. I don’t know if there are other rewards I can assign but let me know if there are any that could be valuable to you.
Thanks again.