java.io.Exception during openProject: wrong username or password

Hi Guys,

if I start my Matlab I got an error window telling me my username or password would be wrong. I'm not logged in in Matlab and dont know which user matlab means. So I ignored it and klicked "ok"

If I want to open an Project like project.prj via the "current Folder" menu, it opens an editor window with the following code:

<?xml version="1.0" encoding="UTF-8"?>
<MATLABProject xmlns="http://www.mathworks.com/MATLABProjectFile" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" version="1.0"/>

If I try to open it via console with openProject('project.prj') I got following error:

Error using matlab.internal.project.util.PathUtils.resolveFileAgainstFileSystem
Java exception occurred:
java.io.IOException: Der Benutzername oder das Kennwort ist falsch

	at java.io.WinNTFileSystem.canonicalize0(Native Method)

	at java.io.WinNTFileSystem.canonicalize(WinNTFileSystem.java:428)

	at java.io.File.getCanonicalPath(File.java:618)

	at java.io.File.getCanonicalFile(File.java:643)


Error in matlab.internal.project.util.PathUtils.getJavaFileForProjectLoadFromMATLABString

Error in matlab.project.loadProject

Error in openProject
 

I'm very confused, cause that worked fine until now. Can anybody help me. Thank you!

PS: I already restarted my PC, still same problem.