I got an error occurred while launching the modpack

[Caboose298]

I got an error code when try to launch my modpack ""through the launcher in Launcher-master\launcher\build\libs for I was only trying to test it real quick"" and I only started using this platform the other day I think I just need a little of help. I think I got the Modpack compiled correctly and I don't know where else to go for help who knows I'm probably doing something wrong thanks for the help.

error::

com.fasterxml.jackson.core.JsonParseException: Unexpected character ('<' (code 60)): expected a valid value (number, String, array, object, 'true', 'false' or 'null')
at [Source: java.io.StringReader@3c890a90; line: 1, column: 2]
at com.fasterxml.jackson.core.JsonParser._constructError(JsonParser.java:1524)
at com.fasterxml.jackson.core.base.ParserMinimalBase._reportError(ParserMinimalBase.java:557)
at com.fasterxml.jackson.core.base.ParserMinimalBase._reportUnexpectedChar(ParserMinimalBase.java:475)
at com.fasterxml.jackson.core.json.ReaderBasedJsonParser._handleOddValue(ReaderBasedJsonParser.java:1415)
at com.fasterxml.jackson.core.json.ReaderBasedJsonParser.nextToken(ReaderBasedJsonParser.java:679)
at com.fasterxml.jackson.databind.ObjectMapper._initForReading(ObjectMapper.java:3024)
at com.fasterxml.jackson.databind.ObjectMapper._readMapAndClose(ObjectMapper.java:2971)
at com.fasterxml.jackson.databind.ObjectMapper.readValue(ObjectMapper.java:2091)
at com.skcraft.launcher.util.HttpRequest$BufferedResponse.asJson(HttpRequest.java:494)
at com.skcraft.launcher.update.BaseUpdater.installPackage(BaseUpdater.java:92)
at com.skcraft.launcher.update.Updater.update(Updater.java:165)
at com.skcraft.launcher.update.Updater.call(Updater.java:97)
at com.skcraft.launcher.update.Updater.call(Updater.java:40)
at java.util.concurrent.FutureTask.run(Unknown Source)
at java.util.concurrent.ThreadPoolExecutor.runWorker(Unknown Source)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(Unknown Source)
at java.lang.Thread.run(Unknown Source)

[hedgehog1029]

sounds like your web server is returning an HTML error page - gonna convert this into a help discussion

[Caboose298]

Is there a way to link temporary files to GitHub so I can just test the modpack so I could see if it actually works. I'm trying to fix the error but I'm having no luck probably due to lack of sleep lol. I'm just trying to get this part of the project out of the way, I'll try to smooth everything out later

[hedgehog1029]

if you just want to test the pack you can use the creator tools, which have a "Test" button which simulates the actual launcher-server exchange

[Caboose298]

I am slowly fixing everything if i need more help I know where to go thanks for your help.