I have this error when I wanted to locate the cities, i have this mods, and the server is from Exaroton.
advancednetherite-forge-2.0.2-1.20.1.jar

alexsmobs-1.22.5.jar

appleskin-forge-mc1.20.1-2.5.0.jar

balm-forge-1.20-7.0.4.jar
BetterAnimationsCollection-v8.0.0-1.20.1-Forge.jar

BiomesOPlenty-1.20.1-18.0.0.592.jar

blockui-1.20-0.0.84-ALPHA.jar

Bookshelf-Forge-1.20-19.0.15.jar

carryon-forge-1.20.1-2.1.0.1.jar

citadel-2.4.2-1.20.1.jar

collective-1.20.1-6.62.jar

CorgiLib-forge-1.20.1-4.0.0.0.jar

CreativeCore_FORGE_v2.10.26_mc1.20.1.jar

creeperoverhaul-3.0.1-forge.jar

Croptopia-1.20-FORGE-2.3.1.jar
Cucumber-1.20.1-7.0.0.jar
domum_ornamentum-1.20-1.0.103-ALPHA-universal.jar

enderchests-forge-1.20.1-1.0.jar

endertrigon-1.20.1-1.0.jar

EnderZoology-v8.0.1-1.20.1-Forge.jar
endrem_forge-5.2.3-R-1.20.X.jar
Enhanced_Celestials-forge-1.20.1-5.0.0.2.jar
EnhancedVisuals_FORGE_v1.6.6_mc1.20.jar
EyesInTheDarkness-1.20-1.3.9.jar
From-The-Fog-1.20-v1.9.2-Forge-Fabric.jar
geckolib-forge-1.20-4.2.jar
Jade-1.20-forge-11.1.4.jar
jei-1.20.1-forge-15.2.0.22.jar

journeymap-1.20.1-5.9.10-forge.jar
lostcities-1.20-7.0.0.jar

lostsouls-1.20-4.0.0.jar

majrusz-library-1.20-4.3.2.jar

majruszs-accessories-1.20-1.2.2.jar

majruszs-difficulty-1.20-1.7.7.jar
majruszs-enchantments-1.20-1.9.0.jar
mcw-paintings-1.0.4forge-mc1.20.jar
modernlife-1.20.1-1.61.jar

moonlight-1.20-2.5.17-forge.jar

multipiston-1.20-1.2.29-ALPHA.jar

MysticalAgriculture-1.20.1-7.0.0.jar

netherdepthsupgrade-3.0.1-1.20.jar

PuzzlesLib-v8.0.7-1.20.1-Forge.jar

resourcefulconfig-forge-1.20-2.0.0.jar

shetiphiancore-forge-1.20.1-1.0.jar

simplylight-1.20.1-1.4.5-build.49.jar

structurize-1.20-1.0.516-ALPHA.jar

supplementaries-1.20-2.5.17.jar
TerraBlender-forge-1.20.1-3.0.0.165.jar

The_Undergarden-1.20.1-0.8.6.jar

tlc_forge-1.0.3-R-1.20.X.jar
TradingPost-v8.0.0-1.20.1-Forge.jar
120.50 kBTravelersBackpack-1.20.1-9.1.3.jar

villagernames-1.20.1-5.2.jar
56.76 kBvisuality-forge-2.0.1.jar

Waddles-1.20.1-0.9.4.jar

waystones-forge-1.20-14.0.0.jar

How did you create the world? Did you enable Lost Cities when creating the world? They are not enabled by default

Ohh I've already seen a video on YT that explains how. I had to create a world in single player and then export to the server. Well thats it, thanks for helping.

How did you create the world? Did you enable Lost Cities when creating the world? They are not enabled by default

I created in Exaroton server. How can I enable? It is like biomes o plenty that I have to put the name of the mod in the Type of world?