Nach Upgrade WebGUI nicht erreichbar

After 3.0.13 I have no full working WebGUI on my device.
It's getting better, but also with 3.0.24 problems.

Only installed plugin is 'omvextrasorg 3.3.1'

After login the 'Service status' and 'System information' are displayed.
CPU load stays at 100%. Normally after a few seconds load goes down to ~10%.
After some seconds a popup comes in browser:

'An error has occurred'. No details, only OK.
I have to hit 7 times OK, after some seconds new popup appear.

Not in all menue that happens. For example in 'Monitoring' (disabled) no popup error, but CPU load ~50%.
What is causing the high CPU Load???
In 'top' I see several tasks 'php5-fpm'
What information is needed to solve the problem?

In /var/log/syslog:
Jun 22 15:15:20 iconnect2 monit[2184]: 'nginx' failed protocol test [HTTP] at INET[127.0.0.1:443] via TCPSSL -- HTTP: Error receiving data -- Resource temporarily unavailable
Jun 22 15:15:20 iconnect2 monit[2184]: 'nginx' trying to restart
Jun 22 15:15:20 iconnect2 monit[2184]: 'nginx' stop: /bin/systemctl
Jun 22 15:15:21 iconnect2 systemd[1]: Stopping A high performance web server and a reverse proxy server...
Jun 22 15:15:26 iconnect2 systemd[1]: Stopped A high performance web server and a reverse proxy server.
Jun 22 15:15:27 iconnect2 monit[2184]: 'nginx' start: /bin/systemctl
Jun 22 15:15:27 iconnect2 systemd[1]: Starting A high performance web server and a reverse proxy server...
Jun 22 15:15:30 iconnect2 systemd[1]: Started A high performance web server and a reverse proxy server.
Jun 22 15:15:35 iconnect2 monit[2184]: 'nginx' failed protocol test [HTTP] at INET[127.0.0.1:80] via TCP -- HTTP: Error receiving data -- Resource temporarily unavailable

In /var/log/nginx/error.log
2016/06/22 15:15:26 [alert] 4384#0: *1 open socket #14 left in connection 3
2016/06/22 15:15:26 [alert] 4384#0: *13 open socket #15 left in connection 4
2016/06/22 15:15:26 [alert] 4384#0: *41 open socket #16 left in connection 5
2016/06/22 15:15:26 [alert] 4384#0: *27 open socket #25 left in connection 6
2016/06/22 15:15:26 [alert] 4384#0: *5 open socket #18 left in connection 7
2016/06/22 15:15:26 [alert] 4384#0: *36 open socket #19 left in connection 8
2016/06/22 15:15:26 [alert] 4384#0: *7 open socket #20 left in connection 9
2016/06/22 15:15:26 [alert] 4384#0: *39 open socket #21 left in connection 10
2016/06/22 15:15:26 [alert] 4384#0: *9 open socket #22 left in connection 11
2016/06/22 15:15:26 [alert] 4384#0: *30 open socket #23 left in connection 12
2016/06/22 15:15:26 [alert] 4384#0: *11 open socket #24 left in connection 13
2016/06/22 15:15:26 [alert] 4384#0: *26 open socket #17 left in connection 14
2016/06/22 15:15:26 [alert] 4384#0: *15 open socket #26 left in connection 15
2016/06/22 15:15:26 [alert] 4384#0: *31 open socket #27 left in connection 16
2016/06/22 15:15:26 [alert] 4384#0: *17 open socket #28 left in connection 17
2016/06/22 15:15:26 [alert] 4384#0: *32 open socket #29 left in connection 18
2016/06/22 15:15:26 [alert] 4384#0: *19 open socket #30 left in connection 19
2016/06/22 15:15:26 [alert] 4384#0: *40 open socket #31 left in connection 20
2016/06/22 15:15:26 [alert] 4384#0: *21 open socket #32 left in connection 21
2016/06/22 15:15:26 [alert] 4384#0: *37 open socket #33 left in connection 22
2016/06/22 15:15:26 [alert] 4384#0: aborting
2016/06/22 15:15:26 [alert] 4385#0: *28 open socket #14 left in connection 3
2016/06/22 15:15:26 [alert] 4385#0: *29 open socket #15 left in connection 4
2016/06/22 15:15:26 [alert] 4385#0: *33 open socket #16 left in connection 5
2016/06/22 15:15:26 [alert] 4385#0: *34 open socket #17 left in connection 6
2016/06/22 15:15:26 [alert] 4385#0: aborting

Thank you for this great software!

One short question. My OMV3 says, that 3.3.1 is the newest one. How can i upgrade?

Ok, that works. Thanks again!

Thank you for the help.

Also with omv-extras V3.3.3 the error in the WebGUI comes.
It takes longer till the error comes. But the CPU load is high.
Same errors in log.

After deinstall omv-extras same error. -> nothing to do with omv-extras.
Now no plugins installed.

In Dashboard 'Service status': Enabled: SSH Running: NFS, SNMP, SSH, TFTP
Why are NFS, SNMP and TFTP are running?
In the left menu in NFS, SNMP and TFTP they are disabled.
In Diagnostic, System Information, Processes i see nfsiod, snmpd,in.tftpd
What's going wrong there?

By the way. Seems that something in my sources.list is missing. I had to manually install the omv-extras V3.3.3
In the /etc/apt/sources.list only entries for debian jessie.
In the Menu in 'OMV-Extras' Repo i have selected: Stable omv-extras.org + Erasmus plugins (dl.bintray.com/openmediavault-plugin-developers/erasmus/ jessie main)

What was missing for the omv-extras 3.3.3?

After 3.0.13 I have no full working WebGUI on my device.

Configuration:
apt-get update, apt-get upgrade in command applied with no errors.

Installed plugins
- openmediavault-omvextrasorg 3.3.5
- openmediavault-flashmemory 3.4.2

In Dashboard 'Service status': Enabled: SSH, SMB/CIFS

Error:
After login the Dashboard with 'Service status' and 'System information' are displayed.
CPU load stays at 100%. Normally after a few seconds load goes down to ~10%.
After some seconds a popup comes in browser:
'An error has occurred'. No details, only OK.
I have to hit 5 times OK, after about 50 seconds new popup appear.

Not in all WebGui items that happens. For example in 'Monitoring' (disabled) no popup error, but CPU load ~50%.
What is causing the high CPU Load???

In 'top' I see several tasks 'php5-fpm'
What information is needed to solve the problem?

In /var/log/syslog:
Jul 16 17:23:13 iconnect2 systemd[1]: Stopped A high performance web server and a reverse proxy server.
Jul 16 17:23:13 iconnect2 monit[2007]: 'nginx' start: /bin/systemctl
Jul 16 17:23:14 iconnect2 systemd[1]: Starting A high performance web server and a reverse proxy server...
Jul 16 17:23:16 iconnect2 systemd[1]: Failed to read PID from file /run/nginx.pid: Invalid argument
Jul 16 17:23:16 iconnect2 systemd[1]: Started A high performance web server and a reverse proxy server.
Jul 16 17:23:51 iconnect2 monit[2007]: 'iconnect2.fritz.box' loadavg(5min) of 3.4 matches resource limit [loadavg(5min)>1.0]
Jul 16 17:23:51 iconnect2 monit[2007]: 'iconnect2.fritz.box' loadavg(1min) of 4.4 matches resource limit [loadavg(1min)>2.0]
Jul 16 17:23:59 iconnect2 monit[2007]: 'nginx' failed protocol test [HTTP] at INET[127.0.0.1:443] via TCPSSL -- HTTP: Error receiving data -- Resource temporarily unavailable
Jul 16 17:23:59 iconnect2 monit[2007]: 'nginx' trying to restart
Jul 16 17:23:59 iconnect2 monit[2007]: 'nginx' stop: /bin/systemctl
Jul 16 17:23:59 iconnect2 systemd[1]: Stopping A high performance web server and a reverse proxy server...

In /var/log/nginx/error.log
2016/07/16 17:23:13 [alert] 3919#0: *3 open socket #14 left in connection 3
2016/07/16 17:23:13 [alert] 3919#0: *45 open socket #17 left in connection 4
2016/07/16 17:23:13 [alert] 3919#0: *43 open socket #15 left in connection 5
2016/07/16 17:23:13 [alert] 3919#0: *44 open socket #16 left in connection 6
2016/07/16 17:23:13 [alert] 3919#0: *46 open socket #18 left in connection 7
2016/07/16 17:23:13 [alert] 3919#0: *47 open socket #19 left in connection 8
2016/07/16 17:23:13 [alert] 3919#0: *48 open socket #20 left in connection 9
2016/07/16 17:23:13 [alert] 3919#0: *49 open socket #21 left in connection 10
2016/07/16 17:23:13 [alert] 3919#0: aborting
2016/07/16 17:23:13 [alert] 3921#0: *54 open socket #10 left in connection 3
2016/07/16 17:23:13 [alert] 3921#0: *55 open socket #12 left in connection 4
2016/07/16 17:23:13 [alert] 3921#0: *56 open socket #14 left in connection 5
2016/07/16 17:23:13 [alert] 3921#0: *57 open socket #15 left in connection 6
2016/07/16 17:23:13 [alert] 3921#0: aborting

I also tested deinstall omv-extras same error. -> nothing to do with plugins.
What information is needed to solve the problem?