Hello. First of all move this thread to the altcoin section. There's a "move topic" down in this page. Select "Alternative cryptocurrencies - Altcoin Discussion".

Could you send me the marketplace script in private so I can try to debug it? I do have a Monero node running, and maybe I can figure out what's wrong, but without this specific web module, I have no idea what might be the fault. It could even be the PHP version. Alternatively, you can try to contact them.