I just upgraded one of my gateways to 8.3. I installed the latest version of designer, and now my gateways that are not updated to 8.3 I get “Launch client jar Invalid - This launch client jar signature is invalid. Contact and administrator.”
If your 8.1 gateways are older than the signing jar, you need to either upgrade the gateways (so that a signed jar is distributed) or adjust the 8.3 designer launcher to allow unsigned jars (worse for security). See advice in this thread:
I just tried this and still had no success. The gateway I am trying to connect to is 8.1.31. It is one that I can not upgrade right now. Any other ideas?
Make sure there are no instances of the designer launcher running, and make sure that your edit actually went through. There is also LOOSE, weaker than LENIENT: Launchers and Workstation | Ignition User Manual
I tried a couple more times and it did work!! Thanks for your help!
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