[Solved] Unable to open my pack with broken XML file

Hi, I made an animation pack and I messed up the XML file and saved it. Now I am unable to open my package in S4S to modify the XML file. As soon as I try to open it I'm presented with this error and no way to continue.

The Sims 4 Studio - Version 3.1.5.9

System.Xml.XmlException: The 'L' start tag on line 255 position 3 does not match the end tag of 'U'. Line 320, position 5.

at System.Xml.XmlTextReaderImpl.Throw(Exception e)

at System.Xml.XmlTextReaderImpl.Throw(String res, String[] args)

at System.Xml.XmlTextReaderImpl.ThrowTagMismatch(NodeData startTag)

at System.Xml.XmlTextReaderImpl.ParseEndElement()

at System.Xml.XmlTextReaderImpl.ParseElementContent()

at System.Xml.XmlTextReaderImpl.Read()

at System.Xml.Linq.XContainer.ReadContentFrom(XmlReader r)

at System.Xml.Linq.XContainer.ReadContentFrom(XmlReader r, LoadOptions o)

at System.Xml.Linq.XDocument.Load(XmlReader reader, LoadOptions options)

at System.Xml.Linq.XDocument.Parse(String text, LoadOptions options)

at S4Studio.ViewModels.Animation.AnimationPackCustomContent.<>c.<get_PosePackInstance>b__60_1(SnippetTuningResource x)

at System.Linq.Enumerable.WhereEnumerableIterator`1.MoveNext()

at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)

at S4Studio.ViewModels.Animation.AnimationPackCustomContent.get_PosePackInstance()

at S4Studio.ViewModels.Animation.AnimationPackCustomContent.LoadPosePack()

at S4Studio.ViewModels.Animation.AnimationPackCustomContent..ctor(IWindow window, IResourceProvider global, IDBPFPackage package, IAnimationListProvider animation_source)

at S4Studio.ViewModels.Animation.AnimationPackCustomContent..ctor(IWindow window, IResourceProvider global, IDBPFPackage package)

at S4Studio.Shared.StudioDocumentModel.LoadViewModel()

at S4Studio.Shared.StudioDocumentModel.set_Package(IDBPFPackage value)

at S4Studio.MainWindow.LoadProject(String full_path)