Finally works! Shadowed Jankson

build.gradle

@@ -19,19 +19,14 @@ archivesBaseName = 'textile_backup[FORGE]'
 
 sourceCompatibility = targetCompatibility = compileJava.sourceCompatibility = compileJava.targetCompatibility = '1.8' // Need this here so eclipse task generates correctly.
 
+configurations {
+    shade
+    compile.extendsFrom shade
+}
+
 minecraft {
-    // The mappings can be changed at any time, and must be in the following format.
-    // snapshot_YYYYMMDD   Snapshot are built nightly.
-    // stable_#            Stables are built at the discretion of the MCP team.
-    // Use non-default mappings at your own risk. they may not always work.
-    // Simply re-run your setup task after changing the mappings to update your workspace.
     mappings channel: 'snapshot', version: '20190719-1.14.3'
-    // makeObfSourceJar = false // an Srg named sources jar is made by default. uncomment this to disable.
 
-    // accessTransformer = file('src/main/resources/META-INF/accesstransformer.cfg')
-
-    // Default run configurations.
-    // These can be tweaked, removed, or duplicated as needed.
     runs {
         client {
             workingDirectory project.file('run')
@@ -85,32 +80,15 @@ minecraft {
     }
 }
 
+repositories {
+    mavenCentral()
+}
+
 dependencies {
-    // Specify the version of Minecraft to use, If this is any group other then 'net.minecraft' it is assumed
-    // that the dep is a ForgeGradle 'patcher' dependency. And it's patches will be applied.
-    // The userdev artifact is a special name and will get all sorts of transformations applied to it.
     minecraft 'net.minecraftforge:forge:1.14.4-28.2.0'
 
     compile "blue.endless:jankson:1.2.0"
-
+    shade "blue.endless:jankson:1.2.0"
-    // You may put jars on which you depend on in ./libs or you may define them like so..
-    // compile "some.group:artifact:version:classifier"
-    // compile "some.group:artifact:version"
-
-    // Real examples
-    // compile 'com.mod-buildcraft:buildcraft:6.0.8:dev'  // adds buildcraft to the dev env
-    // compile 'com.googlecode.efficient-java-matrix-library:ejml:0.24' // adds ejml to the dev env
-
-    // The 'provided' configuration is for optional dependencies that exist at compile-time but might not at runtime.
-    // provided 'com.mod-buildcraft:buildcraft:6.0.8:dev'
-
-    // These dependencies get remapped to your current MCP mappings
-    // deobf 'com.mod-buildcraft:buildcraft:6.0.8:dev'
-
-    // For more info...
-    // http://www.gradle.org/docs/current/userguide/artifact_dependencies_tutorial.html
-    // http://www.gradle.org/docs/current/userguide/dependency_management.html
-
 }
 
 // Example for how to get properties into the manifest for reading by the runtime..
@@ -126,12 +104,14 @@ jar {
             "Implementation-Timestamp": new Date().format("yyyy-MM-dd'T'HH:mm:ssZ")
         ])
     }
+
+    configurations.shade.each { dep ->
+        from(project.zipTree(dep)){
+            exclude 'META-INF', 'META-INF/**'
+        }
+    }
 }
 
-// Example configuration to allow publishing using the maven-publish task
-// we define a custom artifact that is sourced from the reobfJar output task
-// and then declare that to be published
-// Note you'll need to add a repository here
 def reobfFile = file("$buildDir/reobfJar/output.jar")
 def reobfArtifact = artifacts.add('default', reobfFile) {
     type 'jar'

src/main/java/szum123321/textile_backup/core/BackupHelper.java

@@ -50,7 +50,7 @@ public class BackupHelper {
         Utilities.log("Saving server...", ctx);
 
         if(save)
-            server.save(true, false, false);
+            server.save(false, true, false);
 
         Thread thread = new Thread(new MakeBackupThread(server, ctx, comment));
 

src/main/resources/META-INF/mods.toml

@@ -6,7 +6,7 @@ issueTrackerURL="https://github.com/Szum123321/textile_backup/issues" #optional
 modId="textile_backup" #mandatory
 version="[Forge]1.1.1-1.14.4" #mandatory
 displayName="Textile Backup" #mandatory
-updateJSONURL="http://myurl.me/" #optional
+updateJSONURL="https://github.com/Szum123321/textile_backup/blob/Forge-1.14.4/update.json" #optional
 displayURL="https://www.curseforge.com/minecraft/mc-mods/textile-backup" #optional
 logoFile="textile_backup.png" #optional
 credits="Made on request of one of curseforge users" #optional