fatal error in IDE version 2023.3 EAP

[bluish-elvis]

IDEA won't show Settings> Appearance page

PyCharm freezes with error dialog
and fails launch by critical error

Cannot set 1a889165-3e3a-4b17-8191-668be6e1fdca
theme:
@NotNull method
com/intellij/ide/ui/laf/UIThemeLookAndFeelInfoImpl.getName must not return null

[TTechNomad]

same problem
installed failed

[DavidAntliff]

I see this too in RustRover 2023.3 EAP. As a consequence I submitted feedback to JetBrains and they directed me here, so good to see it's already reported.

[thvardhan]

Thank you for reporting this issue, it has been fixed in version 5.5.

[DavidAntliff]

Thank you for reporting this issue, it has been fixed in version 5.5.

I can confirm, Settings > Appearance dialog works fine in RustRover now - thank you!