Unable to start Designer or Client ERROR "This Launch Jar Signature is invalid. Contact an administrator"

Ignition
21

It worked for me in following way.

I deleted .Ignition file from \Users folder and then again tried to add designer and launch. It worked like before.

22

I am getting this error and yes my ignition is installed on redhat linux and I am opening it in windows PC. my redhat has 8.1.23 and my PC has 8.3.0 installed. I am able to to open in my other PC that has 8.1.48 installed but I want to open it in 8.3.0 but do not want to upgrade it.

23

See the advice at Launchers and Workstation | Ignition User Manual, you'll have to edit one of the launcher files.

1 Like
24

Thank you very much. I changed to LENIENT and it worked. Seems 8.3.0 is considering 8.1.23 as legacy and it’s jar file is unsigned which was causing fault. All good now.

25

I set up a Linux VM for testing 8.3 things before we attempt a migration. Problem for me is that I installed with sudo and the .ignition folder in my home was owned by root. I changed permission to my local user and the error went away.