Welcome to the forum.
Can you please provide us with more information:
As Hunt has already asked and which is very important to include
a. What version of Premiere Elements are you using and on what computer operating system is it running?
But, you say only Elements Organizer, not including Premiere Elements nor Photoshop Elements?
So, I will add these additional questions:
What are you doing in the Elements Organizer when it stops working. Just opening it? Is this a "it worked before but now" issue or a "it never worked before" issue. Please detail.
Once we get the basic details requested above, we can plan troubleshooting strategy which might involve:
a. deleting the settings file
b. creating a new catalog
c. looking at what you have imported into the Elements Organizer or are trying to import into it
But all is speculation without more details.