# "This launch client jar signature is invalid" ubuntu 24.04

**URL:** <https://forum.inductiveautomation.com/t/this-launch-client-jar-signature-is-invalid-ubuntu-24-04/107713>\
**Category:** Ignition\
**Created:** [June 24, 2025, 12:46pm UTC](https://forum.inductiveautomation.com/t/this-launch-client-jar-signature-is-invalid-ubuntu-24-04/107713 "2025-06-24T12:46:10Z")\
**Posts on this page:** 4\
**Page:** 1

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**Author:** ![parth.shah1](https://avatars.discourse-cdn.com/v4/letter/p/ee7513/32.png) [@parth.shah1](https://forum.inductiveautomation.com/u/parth.shah1)\
**Post date:** [June 24, 2025, 12:46pm UTC](https://forum.inductiveautomation.com/t/this-launch-client-jar-signature-is-invalid-ubuntu-24-04/107713/1 "2025-06-24T12:46:10Z")

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"This launch client jar signature is invalid" is the error I am getting at the time of opening the designer. Ignition version 8.1.48. Ubuntu 24.04.2 LTS. Any solution around this?

I am no expert in linux so I am not sure what I missed at the time of installation but I followed the guide as per inductive automation.

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**Author:** ![pturmel](https://sea1.discourse-cdn.com/inductiveautomation/user_avatar/forum.inductiveautomation.com/pturmel/32/3295_2.png) [@pturmel](https://forum.inductiveautomation.com/u/pturmel)\
**Post date:** [June 24, 2025, 12:58pm UTC](https://forum.inductiveautomation.com/t/this-launch-client-jar-signature-is-invalid-ubuntu-24-04/107713/2 "2025-06-24T12:58:22Z")

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The usually means something between your workstation and your gateway is disrupting that download. Often an anti-malware package. Sometimes a corporate deep inspection firewall with a man-in-the-middle certificate.

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**Author:** ![parth.shah1](https://avatars.discourse-cdn.com/v4/letter/p/ee7513/32.png) [@parth.shah1](https://forum.inductiveautomation.com/u/parth.shah1)\
**Post date:** [June 24, 2025, 1:39pm UTC](https://forum.inductiveautomation.com/t/this-launch-client-jar-signature-is-invalid-ubuntu-24-04/107713/3 "2025-06-24T13:39:11Z")

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I am using open virtual box image with no firewall. It is ubuntu 24.04 OS and I have the admin rights to the system. I installed ignition in ubuntu 20.02 but then upgraded the OS to latest 24.04 before even opening the designer but this should not be a problem I believe.

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**Author:** ![JordanCClark](https://sea1.discourse-cdn.com/inductiveautomation/user_avatar/forum.inductiveautomation.com/jordancclark/32/83362_2.png) [@JordanCClark](https://forum.inductiveautomation.com/u/JordanCClark)\
**Post date:** [June 24, 2025, 7:04pm UTC](https://forum.inductiveautomation.com/t/this-launch-client-jar-signature-is-invalid-ubuntu-24-04/107713/4 "2025-06-24T19:04:53Z")

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This would also happen if the date of the VM is off compared to the gateway.