I have a little problem and I hope someone can help me here.

Since 1.15 we have always had a corner on the Dynmap that is rendered incorrectly.

it does not render smoothly on the spot but always makes a notch.

Even if I delete the complete dynmap folder and let everything render again, the same problem arises at exactly the same place.

everything else is fabulously round. Does anyone know the problem that it always causes the same problem in the same place?

I don't think this problem is related to dynmap. Dynmap just renders existing chunks, so I think these chunks just exist and you have to delete them and rerender your map if you want to get rid of them.

So I should delete the chunk where the errors always appear so that they can regenerate?

Yes, delete those chunks in the world files and re-render the area and dynmap should remove them.

If so, the question is what chunk is it? this place is at -3371 3388 how do I get the name of the chunk out?
in which folder can I find the chunks?

https://dinnerbone.com/minecraft/tools/coordinates/

In your world folder, idk the best way to do it, either delete the region file or edit it with an nbt editor.

Thank you so much. I'll test it out and let you know :)

it really helped. Good that nothing was built in the chunk. Otherwise the problem would not have been repairable. Thanks for the hint

If you're using the WorldBorder plugin, it has a command to delete chunks outside the worldborder