diff --git a/source/funkin/backend/utils/HttpUtil.hx b/source/funkin/backend/utils/HttpUtil.hx
index be9d8ac3..1fc78f50 100644
--- a/source/funkin/backend/utils/HttpUtil.hx
+++ b/source/funkin/backend/utils/HttpUtil.hx
@@ -5,56 +5,104 @@ import haxe.Http;
 final class HttpUtil
 {
 	public static var userAgent:String = Flags.USER_AGENT;
-	public static function requestText(url:String)
+
+	public static function requestText(url:String):String
 	{
-		var r = null;
+		var result:String = null;
+		var error:HttpError = null;
+		var redirected:Bool = false;
+
 		var h = new Http(url);
 		h.setHeader("User-Agent", userAgent);
 
-		h.onStatus = function(s)
+		h.onStatus = function(status)
 		{
-			if (isRedirect(s))
-				r = requestText(h.responseHeaders.get("Location"));
+			redirected = isRedirect(status);
+			if (redirected)
+			{
+				var loc = h.responseHeaders.get("Location");
+				if (loc != null)
+					result = requestText(loc);
+				else
+					error = new HttpError("Missing Location header in redirect", url, status, true);
+			}
 		};
 
-		h.onData = function(d)
+		h.onData = function(data)
 		{
-			if (r == null)
-				r = d;
-		}
-		h.onError = function(e)
+			if (result == null)
+				result = data;
+		};
+
+		h.onError = function(msg)
 		{
-			throw e;
-		}
+			error = new HttpError(msg, url);
+		};
 
 		h.request(false);
-		return r;
+
+		if (error != null)
+			throw error;
+
+		if (result == null)
+			throw new HttpError("Unknown error or empty response", url);
+
+		return result;
 	}
 
-	public static function requestBytes(url:String)
+	public static function requestBytes(url:String):haxe.io.Bytes
 	{
-		var r = null;
+		var result:haxe.io.Bytes = null;
+		var error:HttpError = null;
+		var redirected:Bool = false;
+
 		var h = new Http(url);
 		h.setHeader("User-Agent", userAgent);
 
-		h.onStatus = function(s)
+		h.onStatus = function(status)
 		{
-			if (isRedirect(s))
-				r = requestBytes(h.responseHeaders.get("Location"));
+			redirected = isRedirect(status);
+			if (redirected)
+			{
+				var loc = h.responseHeaders.get("Location");
+				if (loc != null)
+					result = requestBytes(loc);
+				else
+					error = new HttpError("Missing Location header in redirect", url, status, true);
+			}
 		};
 
-		h.onBytes = function(d)
+		h.onBytes = function(data)
 		{
-			if (r == null)
-				r = d;
-		}
-		h.onError = function(e)
+			if (result == null)
+				result = data;
+		};
+
+		h.onError = function(msg)
 		{
-			throw e;
-		}
+			error = new HttpError(msg, url);
+		};
 
 		h.request(false);
-		return r;
+
+		if (error != null)
+			throw error;
+
+		if (result == null)
+			throw new HttpError("Unknown error or empty byte response", url);
+
+		return result;
+	}
+
+	public static function hasInternet():Bool
+	{
+		try {
+			var r = requestText("https://www.google.com/");
+			return true;
+		} catch (e:HttpError) {
+			Logs.trace('[HttpUtil.hasInternet] Failed: ${e.toString()}', WARNING);
+			return false;
+		}
 	}
 
 	private static function isRedirect(status:Int):Bool
@@ -69,3 +117,32 @@ final class HttpUtil
 		return false;
 	}
 }
+
+private class HttpError {
+	public var message:String;
+	public var url:String;
+	public var status:Int;
+	public var redirected:Bool;
+
+	public function new(message:String, url:String, ?status:Int = -1, ?redirected:Bool = false) {
+		this.message = message;
+		this.url = url;
+		this.status = status;
+		this.redirected = redirected;
+	}
+
+	public function toString():String {
+		var parts:Array<String> = ['[HttpError]'];
+
+		if (status != -1)
+			parts.push('Status: $status');
+
+		if (redirected)
+			parts.push('(Redirected)');
+
+		parts.push('URL: $url');
+		parts.push('Message: $message');
+
+		return parts.join(' | ');
+	}
+}
diff --git a/source/funkin/editors/character/CharacterAnimButton.hx b/source/funkin/editors/character/CharacterAnimButton.hx
index 065a0d85..80dbb480 100644
--- a/source/funkin/editors/character/CharacterAnimButton.hx
+++ b/source/funkin/editors/character/CharacterAnimButton.hx
@@ -367,18 +367,39 @@ class CharacterAnimButton extends UIButton {
 		var animData:AnimData = parent.character.animDatas[anim];
 		var oldIndices:Array<Int> = animData.indices.copy();
 
+		var maxFrameIndex = parent.character.frames.frames.length - 1;
+		for (index in indicies) {
+			if (index < 0 || index > maxFrameIndex) {
+				Logs.trace('[changeIndicies] Invalid frame index $index (max allowed: $maxFrameIndex). Change aborted.', ERROR, RED);
+				return;
+			}
+		}
+
 		animData.indices = indicies;
 
-		__refreshAnimation();
+		try {
+			__refreshAnimation();
+
+			if (parent.character.getAnimName() == anim)
+				CharacterEditor.instance.playAnimation(anim);
+		} catch (e:Dynamic) {
+			Logs.trace('[changeIndicies] Error occurred: $e. Reverting to old indices.', WARNING, YELLOW);
+
+			animData.indices = oldIndices;
+			__refreshAnimation();
+			if (parent.character.getAnimName() == anim)
+				CharacterEditor.instance.playAnimation(anim);
+
+			return;
+		}
 
-		if (parent.character.getAnimName() == anim)
-			CharacterEditor.instance.playAnimation(anim);
-		
 		indicesTextBox.label.text = animData.indices.join(", ");
 
-		if (addToUndo) CharacterEditor.undos.addToUndo(CAnimEditIndices(ID, oldIndices, indicies));
+		if (addToUndo)
+			CharacterEditor.undos.addToUndo(CAnimEditIndices(ID, oldIndices, indicies));
 	}
 
+
 	public inline function refreshFlxAnimationFrames(flxAnimation:FlxAnimation, animData:AnimData) @:privateAccess {
 		try {
 			if (animData.indices.length > 0) {