You don't state which version of Elements you are using. I suspect it is a fairly old one. The error message that you have posted was related to earlier versions of Elements and was often solved by turning off the Media-Analysis features. Have a look in your Organizer Preferences (Edit > Preferences) under Media-Analysis.
Your first image is from the Phtoshop Elements Organizer. It appears your thumbnail database is corrupt. Do the following- doing so will cause Organizer to recreate your thumbanil data base. Really no difference than when the Windows thumb.db files get corrupt in a program- you just delete it and restart the program- window rebuilds the thumbnail database automatically as needed.
If this doesn't work, just remove the OLD from than renamed file and rebot organizer.
As with anything I suggest: do all this at your risk.