Hello, I can't install Core Helper 2 
. When I click on install, I have "There were problem writing to the file".
I'm on Mojave but it has also occurred when I was on High Sierra (but after a while, it started to work...)
Any clues?
Could you please take a screenshot of the error dialog? And, did you find any information relates to Core Helper in the Console.app (Filtering by keywords “core helper”)?
the error dialog is not really self expressive 
I've found an error on the console when launching Core Helper 2:
Core Helper Installer: Unable to load Info.plist exceptions (eGPUOverrides)
If you search "Unable to load Info.plist exceptions" in Console.app, you will find lots of log items from various apps, it seemed harmless.
The error dialog actually reveals a clue, the warning icon shows it's from Core Helper Installer itself, and there is only one place tries to alert error – writing essential files for the launch agent.
Could you please execute these three commands, and send back the output?
ls -la ~/Library/ | grep LaunchAgents
ls -la ~/Library/LaunchAgents/
ls -la ~/Library/Group\ Containers/E78WKS7W4U.io.coressh/
hello here’s the command results:
ls -la ~/Library/ | grep LaunchAgents
drwxr-xr-x 8 root staff 256 Jun 15 09:32 LaunchAgents
ls -la ~/Library/LaunchAgents/
total 48
drwxr-xr-x 8 root staff 256 Jun 15 09:32 .
drwx------@ 83 sylvain staff 2656 Sep 25 16:12 ..
-rw-r--r-- 1 root staff 445 May 24 2017 com.lastpass.LastPassHelper.plist
-rw-r--r-- 1 sylvain staff 577 Jun 15 09:32 com.movavi.maccleaner2.rammonitor.plist
-rw-r--r-- 1 sylvain staff 574 Jun 15 09:32 com.movavi.maccleaner2.scheduler.plist
-rw-r--r-- 1 sylvain staff 612 Jun 15 09:32 com.movavi.maccleaner2.trashmonitor.plist
-rw-r--r-- 1 sylvain staff 512 Jun 15 09:32 com.movavi.maccleaner2.trayagent.plist
-rw-r--r--@ 1 sylvain staff 677 Sep 25 17:05 org.virtualbox.vboxwebsrv.plist
ls -la ~/Library/Group\ Containers/E78WKS7W4U.io.coressh/
total 0
drwx------ 4 sylvain staff 128 Oct 2 16:00 .
drwx------ 40 sylvain staff 1280 Oct 2 14:27 ..
drwx------ 5 sylvain staff 160 Jul 14 14:50 Library
drwxr-xr-x@ 3 sylvain staff 96 Sep 6 11:56 io.coressh.Helper.app
And fyi:
ls -la ~/Library/Group\ Containers/E78WKS7W4U.*
/Users/sylvain/Library/Group Containers/E78WKS7W4U.com.codinn.ssh:
total 0
drwx------ 4 sylvain staff 128 Oct 10 2017 .
drwx------ 40 sylvain staff 1280 Oct 2 14:27 ..
drwx------ 5 sylvain staff 160 Oct 10 2017 Library
drwx------@ 3 sylvain staff 96 Oct 10 2017 identities
/Users/sylvain/Library/Group Containers/E78WKS7W4U.io.coressh:
total 0
drwx------ 4 sylvain staff 128 Oct 2 16:00 .
drwx------ 40 sylvain staff 1280 Oct 2 14:27 ..
drwx------ 5 sylvain staff 160 Jul 14 14:50 Library
drwxr-xr-x@ 3 sylvain staff 96 Sep 6 11:56 io.coressh.Helper.app
/Users/sylvain/Library/Group Containers/E78WKS7W4U.io.coressh.ssh:
total 0
drwx------ 5 sylvain staff 160 May 28 10:52 .
drwx------ 40 sylvain staff 1280 Oct 2 14:27 ..
drwx------@ 6 sylvain staff 192 Sep 13 10:29 .ssh
drwx------ 5 sylvain staff 160 May 28 10:52 Library
drwx------@ 4 sylvain staff 128 Sep 7 14:00 Logs
I tried to change owner of ~/Library/LaunchAgents to myself but still no luck 
ls -la ~/Library/ | grep LaunchAgents
drwxr-xr-x 8 sylvain staff 256 Jun 15 09:32 LaunchAgents
Thanks a lot for the output. Core Helper Installer tries to write a launchd configuration file E78WKS7W4U.io.coressh.helper.plist to the folder ~/Library/LaunchAgents, but apparently it failed to do so.
Could you please check the permission of the folder ~/Library by executing:
ls -la ~ | grep Library
seems to be correct:
ls -la ~ | grep Library
drwx------@ 83 sylvain staff 2656 Sep 25 16:12 Library
fyi, I can do:
$ touch Library/toto
$ ls -l Library/toto
-rw-r--r-- 1 sylvain staff 0 Oct 3 11:45 Library/toto
$ touch Library/LaunchAgents/toto
$ ls -l Library/LaunchAgents/toto
-rw-r--r-- 1 sylvain staff 0 Oct 3 11:46 Library/LaunchAgents/toto
$ rm Library/LaunchAgents/toto
remove Library/LaunchAgents/toto? y
$ ls -l Library/LaunchAgents/toto
ls: Library/LaunchAgents/toto: No such file or directory
$ rm Library/toto
remove Library/toto? y
$ ls -l Library/toto
ls: Library/toto: No such file or directory
I don’t know what happened but it worked!
ls -la ~/Library/LaunchAgents/
total 56
drwxr-xr-x 9 sylvain staff 288 Oct 3 11:48 .
drwx------@ 83 sylvain staff 2656 Oct 3 11:46 ..
-rw-r--r-- 1 sylvain staff 675 Oct 3 11:48 E78WKS7W4U.io.coressh.helper.plist
-rw-r--r-- 1 root staff 445 May 24 2017 com.lastpass.LastPassHelper.plist
-rw-r--r-- 1 sylvain staff 577 Jun 15 09:32 com.movavi.maccleaner2.rammonitor.plist
-rw-r--r-- 1 sylvain staff 574 Jun 15 09:32 com.movavi.maccleaner2.scheduler.plist
-rw-r--r-- 1 sylvain staff 612 Jun 15 09:32 com.movavi.maccleaner2.trashmonitor.plist
-rw-r--r-- 1 sylvain staff 512 Jun 15 09:32 com.movavi.maccleaner2.trayagent.plist
-rw-r--r--@ 1 sylvain staff 677 Sep 25 17:05 org.virtualbox.vboxwebsrv.plist
Good news anyway
The problem is very like caused by the owner of ~/Library/LaunchAgents was changed to root accidentally.
I’m going to close this bug report, anyone who run into similar problem please make a new topic.