Configuration window becomes blank. How do I configure the nodes?

[i_like_enka]

• I installed and began to use KNIME on the CentOS PC.
• Now, for any nodes, configuration window becomes blanck.
• For example, I cannot set the Excel file path in configuration window of Excel reader
  • such as the attached image
  • The window looks blank.
• Would you tell me How to configure the nodes?
• I have installed and have been using KNIME on Windows PC and Ubuntu PC successfully.
• But is there any fact that CentOS PC is not supported?
• Or do I need additional settings for the KNIME?
  
  

[quaeler]

Linux windowing toolkit implementations can be a real hodgepodge of misery; you didn’t mention what version of CentOS you’re on - but perhaps try this Knime Config Dialogs/Popups Blank

[i_like_enka]

Thanks for your reply!!
The problem has been solved by your advice!!