When a user clicks on the Edit Page button the loading notice in the upper right of the page appears and it just sits there spinning.
After 2 or 3 minutes an error message is displayed on the screen.
Using the correlation Id I found this error on the ULS log files :
Unable to locate the WebPartAdderId for the ScriptEditorWebPart. Details: System.Threading.ThreadAbortException: Le thread a été abandonné. à System.Collections.Generic.Dictionary`2.FindEntry(TKey key) à Microsoft.SharePoint.WebPartPages.ScriptEditorWebPart.get_WebPartAdderId()
Note that I restarted IIS but it does not resolved the issue.
Any idea?