wordpress installs not operating properly

[TobiasP]

Since around MU40 about half of the wordpress installations are "not operating properly" according to the wordpress toolkit.

OS Debian 7.11‬
Plesk version 12.5.30 Update #45, last updated at Aug 29, 2016 05:37 PM

This is how it looks:

unfortunately no specific error messages. (are there any logfiles that I could look into?)

rescanning for wp installs and checking for updates did not solve the problem.
curiously only about half of the installations are affected I cannot see any common property, they are all WP 4.6 and also running on fpm php 7.

in /usr/local/psa/admin/logs/panel.log I could find:
[2016-09-07 03:46:58] ERR [util_exec] proc_close() failed ['/opt/psa/admin/bin/w pmng' '--user=****' '--php=/opt/plesk/php/7.0/bin/php' '--' '--path=/var/ www/vhosts/*****/wp' 'core' 'info' '--format=json' '--check-up dates=true'] with exit code [245]

Does anyone have an idea?

 

[TobiasP]

I manually updated the wordpress plugins of these installs and then did a sync with each one. which helped with some but I still have fully updated WP installs that are displayed like in the OP.