Why don't fish spawn (Minecraft)?

I built an automatic fish farm (see pictures), but no fish spawn in it. The farm is on a server where you can change your biome. I've tried Warm Ocean, Lukewarm Ocean, and Lukewarm Deep Sea. So why don't fish spawn on me? P. S. Other farms work.

Recently we also tried to fish in nh lake. In vain.

I don't know 100% why, but I think it's because of the new Minecraft version