cant create new project, crashing

[B5T13]

Keep getting:

DSMapStudio Version 1.11.1

Unknown DCX format.

at SoulsFormats.DCX.Decompress(BinaryReaderEx br, Type& type) in ./src/Andre/SoulsFormats/SoulsFormats/Formats/DCX.cs:line 159
at SoulsFormats.SFUtil.GetDecompressedBR(BinaryReaderEx br, Type& compression) in ./src/Andre/SoulsFormats/SoulsFormats/Util/SFUtil.cs:line 212
at SoulsFormats.MountedSoulsFile1.Read(Memory1 bytes) in ./src/Andre/SoulsFormats/SoulsFormats/Util/MountedSoulsFile.cs:line 28
at SoulsFormats.SFUtil.DecryptERRegulation(String path) in ./src/Andre/SoulsFormats/SoulsFormats/Util/SFUtil.cs:line 531
at StudioCore.ParamEditor.ParamBank.LoadParamsERFromFile(String path, Boolean encrypted) in ./src/StudioCore/ParamEditor/ParamBank.cs:line 952
at StudioCore.ParamEditor.ParamBank.LoadParamsER(Boolean partial) in ./src/StudioCore/ParamEditor/ParamBank.cs:line 878
at StudioCore.ParamEditor.ParamBank.<>c__DisplayClass73_0.b__0() in ./src/StudioCore/ParamEditor/ParamBank.cs:line 1112
at StudioCore.Editor.TaskManager.LiveTask.b__15_0() in ./src/StudioCore/Editor/TaskManager.cs:line 183
at System.Threading.Tasks.Task.InnerInvoke()
at System.Threading.Tasks.Task.<>c.<.cctor>b__281_0(Object obj)
at System.Threading.ExecutionContext.RunFromThreadPoolDispatchLoop(Thread, ExecutionContext, ContextCallback, Object)
--- End of stack trace from previous location ---
at System.Threading.ExecutionContext.RunFromThreadPoolDispatchLoop(Thread, ExecutionContext, ContextCallback, Object)
at System.Threading.Tasks.Task.ExecuteWithThreadLocal(Task&, Thread )