A -103 error is caused by a network problem.
If you are using proxy settings as found in the help page link below, please check to confirm they are set correctly.
If you are not connecting through a proxy server, please delete your proxy settings (delete com.live2d.proxy.plist on macOS), restart your PC, and try activating Cubism Editor again.
*If you are using the sample proxy “myproxyhost:8765”, you will need to change it.

https://help.live2d.com/en/license/license_11/

If you have not configured the proxy settings above or if the problem persists, please follow the steps below to obtain the relevant logs and contact us using the contact form.

[for Windows]

*Replace the “X” with the version of Cubism Editor you are using.

Step 1:
Open the folder where Cubism Editor is installed.
C:\Program Files\Live2D Cubism X.X

Step 2:
Open CubismEditorX.bat in the folder you opened in “Step 1” in a text editor like notepad, and find the

Step 3:
Download the following bat file corresponding to the version of Cubism you’re using.
– .bat file for Cubism 4 Editor
– .bat file for Cubism 5 Editor

Step 4:
Run the “CubismEditorX_DIAGNOSTICS.bat” file downloaded in “Step 3”.

Step 5:
Start up Cubism Editor.

Step 6:
A file called “RLM_DIAGNOSTICS.log” will be output to the “C:\ProgramData\Live2D” folder.
Open the output log with a text editor and check if the file is empty.
*If you do not see the ProgramData folder, please check here

Step 7:
Refer to the following help page to obtain “log.txt”.
　　　https://help.live2d.com/en/other/other_22/

Step 8:
Please contact us via the following link, and attach both the “log.txt” and “RLM_DIAGNOSTICS.log” files to the contact form. We will investigate the cause of the error and get back to you.

[for macOS]

Step 1:
Download the following “com.live2d.rlmdiagnostics.plist” file.
– com.live2d.rlmdiagnostics.plist

Step 2:
Place the “com.live2d.rlmdiagnostics.plist” file in the following folder.
　[your user home folder/Library/LaunchAgents/]

Step 3:
Restart your computer.

Step 4:
Start up Cubism Editor.

Step 5:
A file called “RLM_DIAGNOSTICS.log” will be output to the “Macintosh HD/Library/Application Support/Live2D” folder.
Open the output log with a text editor and check if the file is empty.

Step 6:
Refer to the following help page to obtain “log.txt”.
　　　https://help.live2d.com/en/other/other_22/

Step 7:
Please contact us via the following link, and attach both the “log.txt” and “RLM_DIAGNOSTICS.log” files to the contact form. We will investigate the cause of the error and get back to you.

*Your user home folder (~/) is usually “/Users/[login username]”.
For further information, please refer to Apple’s official support site.
*If you can’t view Library in Finder, go to [Go] > [Home] > [View] > [Show View Options], open the Home folder, and check [Show Library Folder].