How to fix this, my linux version is Ubuntu24.04 LTS

[kenkendk]

Hi @Bunny welcome to the forum!

That problem is caused by Mono not being maintained, and Duplicati depending on Mono.
You can dig into some of the other posts on the topic.

Or you can try the canary builds which no longer uses Mono:

Release: 2.0.9.108 (Canary) 2024-10-03

2.0.9.108_canary_2024-10-03 This release is a canary release intended to be used for testing in preparation of a later stable release. Unlike regular canary builds, this one has a major change in the build system, so it now runs on .NET8. For that reason, the updater in previous canary builds does not detect this update yet, but this can be activated at a later time. The builds are self-contained so Mono or .NET installations are not required to install. Important changes from last Beta Up…