not enough food coming in… you have options, but in my opinion the obvious one at this stage of the game is to build a settler… your population will go down by one, the city will restart producing pop and you will start expanding your empire.
other options: get enough amenities so that your city will produce +10% food, but you’re far from that and it’s too early in the game to easily achieve… Also choose food as the city production priority, but in this case, it won’t make you produce more, the city already uses all the best food tiles it has, so you’d have to get some 2 food tiles around by buying and build farm on them…
Still… for your game’s sake, build a settler
Et si tu as des difficultés avec l’anglais, n’hésite pas a m’envoyer un message

Bonne chance !