Error: Failed to create temporary file. Library: Access denied - when try loading S2 image

When i try to load a Sentinel-2 satellite image into SNAP, nothing happens and i get this error:

java.lang.UnsatisfiedLinkError: Failed to create temporary file for /com/sun/jna/win32-x86-64/jnidispatch.dll library: Zugriff verweigert
at com.sun.jna.Native.loadNativeDispatchLibraryFromClasspath(Native.java:866)
at com.sun.jna.Native.loadNativeDispatchLibrary(Native.java:826)
at com.sun.jna.Native.(Native.java:140)
at org.esa.s2tbx.dataio.Utils$CKernel32.(Utils.java:87)
at org.esa.s2tbx.dataio.Utils.GetShortPathName(Utils.java:45)
at org.esa.s2tbx.dataio.Utils.GetIterativeShortPathName(Utils.java:54)
at org.esa.s2tbx.dataio.openjpeg.OpenJpegUtils.getTileLayoutWithOpenJPEG(OpenJpegUtils.java:59)
at org.esa.s2tbx.dataio.s2.Sentinel2ProductReader.retrieveTileLayoutFromGranuleDirectory(Sentinel2ProductReader.java:266)
at org.esa.s2tbx.dataio.s2.Sentinel2ProductReader.retrieveTileLayoutFromProduct(Sentinel2ProductReader.java:231)
at org.esa.s2tbx.dataio.s2.Sentinel2ProductReader.updateTileLayout(Sentinel2ProductReader.java:186)
at org.esa.s2tbx.dataio.s2.ortho.Sentinel2OrthoProductReader.getMosaicProduct(Sentinel2OrthoProductReader.java:127)
at org.esa.s2tbx.dataio.s2.Sentinel2ProductReader.readProductNodesImpl(Sentinel2ProductReader.java:141)
at org.esa.snap.core.dataio.AbstractProductReader.readProductNodes(AbstractProductReader.java:169)
at org.esa.snap.core.dataio.ProductIO.readProduct(ProductIO.java:158)
at org.esa.snap.rcp.actions.file.ReadProductOperation.run(ReadProductOperation.java:37)
at org.netbeans.modules.progress.ui.RunOffEDTImpl$3.run(RunOffEDTImpl.java:275)
at org.openide.util.RequestProcessor$Task.run(RequestProcessor.java:1423)
[catch] at org.openide.util.RequestProcessor$Processor.run(RequestProcessor.java:2033)