I recently placed an ad in the for sale thread. The issue; every time I would submit my ad, it would return an HTTP 500 error/unknown server error.
I was using Google Chrome. I then tried Explore Edge and noticed when I pasted the Title into the title box, the length overflowed the title box width.
This made me think my title was too long and the server couldn’t handle it, I shortened the title and submitted successfully using Chrome.
I don’t know if you have control over character length issues, warnings if exceeded settings, but I thought I would bring it to your attention, thanks.