Scanning for Wordpress instances fails with the following error:
Resource with UID '3d94553c-e287-49b4-9b40-7e07a440f955' not found.
Issue is caused by database inconsistency. Some application package was no installed or removed correctly.
For Plesk 12.5:
# plesk repair db
For Plesk 12.0 and earlier:
Resolution requires complicated databases manipulations. Please contact Plesk Support for assistance.