Please can anyone help?
I upgraded to Core 7.9.0 and then tried to upgrade software to 7.9.0 but I get the error in the attached screenshot

The logs that are generated from this error look like this:
2018-04-16 16:07:00,986 UpmAsynchronousTaskManager:thread-1 INFO Alexc 966x103x1 p49j6y 10.2.10.86 /rest/plugins/1.0/ [c.a.plugin.loaders.ScanningPluginLoader] No plugins found to be installed
2018-04-16 16:07:01,145 UpmAsynchronousTaskManager:thread-1 INFO Alexc 966x103x1 p49j6y 10.2.10.86 /rest/plugins/1.0/ [c.a.plugin.manager.DefaultPluginManager] Updating plugin 'com.atlassian.jira.jira-software-application' from version '7.9.0' to version '7.9.0'
2018-04-16 16:07:01,164 UpmAsynchronousTaskManager:thread-1 INFO Alexc 966x103x1 p49j6y 10.2.10.86 /rest/plugins/1.0/ [c.a.plugin.loaders.ScanningPluginLoader] Removed plugin 'com.atlassian.jira.jira-software-application'
2018-04-16 16:07:02,263 UpmScheduler:thread-2 WARN Alexc [c.a.upm.pac.PacClientImpl] Update check request may take longer because of the number of add-ons
Thanks
Alex