Hey guys, I’m trying to install ignition on a VM with Linux (Ubuntu (24.04.3 LTS)). Installing the gateway (version 8.1.50) was pretty straightforward with no issues. The issues came when I tried to install the designer. I went to the gateway downloaded designer launcher and it came in a .tar.gz file (which I thought it would come some .exe or .run,) I extracted the downloaded folder and then had to run the designerlauncher.sh file inside the designerlauncher/app/ directory. It opened the launcher, I choose the gateway, and then when I select it to open the designer, the following popup shows:
Okay, had to swim through other topics but I got it done with the topic that you provided. For any other users trying out to install the launcher:
My issue was that the Designer Launcher didn’t create the configuration folder (~/.ignition/designerlauncher-data) when extracted from the .tar.gz file.
It didn’t create that folder or the designerlauncher.json file, so the launcher couldn’t save settings or the signature verification cache — which caused the “This launch JAR signature is invalid” error.
The solutioon was to
extract the .tar.gz under my user directory (~/designerlauncher)
Manually create the folder mkdir -p ~/.ignition/designerlauncher-data
Create the file ~/.ignition/designerlauncher-data/designerlauncher.json
with the following content inside of it {"signature.verification.strength": "AIR_GAPPED"}
and after this designer launcher opened normally and was generating designerlauncher.log and allowing to conect to gateway without error
