Cannot open the spectrum property window

Hi, I have an issue when trying to open the “spectrum properties” window in ccpn3. When I am trying to open it either from the spectra list or from the spectrum tab, it doesn’t open and I get the following error message. Note that it seems to happen only with the most recent verison of MacOS (sequoia 15.3.1), indeed it works with the verison 15.1.1.

Thank you very much for your help!

Traceback (most recent call last):
File “/Applications/ccpnmr/src/python/ccpn/ui/gui/widgets/SideBar.py”,
line 1283, in _raiseObjectProperties
callback(self.mainWindow, dataPid, sideBarObject)
File “/Applications/ccpnmr/src/python/ccpn/ui/gui/lib/MenuActions.py”,
line 235, in call
popup = self.popupClass(parent=node.sidebar, mainWindow=mainWindow,
File
“/Applications/ccpnmr/src/python/ccpn/ui/gui/popups/SpectrumPropertiesPopup.py”,
line 381, in init
_tab = tabFunc(parent=fr)
File
“/Applications/ccpnmr/src/python/ccpn/ui/gui/popups/SpectrumPropertiesPopup.py”,
line 618, in init
self.experimentTypes = spectrum._project._experimentTypeMap
File “/Applications/ccpnmr/src/python/ccpn/core/Project.py”, line
1655, in _experimentTypeMap
refExperimentMap =
NmrExpPrototype.fetchIsotopeRefExperimentMap(self._apiNmrProject.root)
File
“/Applications/ccpnmr/src/python/ccpnmodel/ccpncore/lib/spectrum/NmrExpPrototype.py”,
line 482, in fetchIsotopeRefExperimentMap
expGraph = expPrototype.sortedExpGraphs()[0]
IndexError: list index out of range