Could somebody help please and advice how can I get update add-ons or get one new add-on if I getting message "Problem accessing add-on file at https://marketplace.atlassian.com/download/apps/23915/version/138751".
For example, can update "Universal Plugin Manager".
Thanks for any advice anf assist.
You can certainly try updating UPM (Universal Plugin Manager) this could fix any issues you have updating an add-on.
For installation, there are alternate methods. I'm not sure which one is causing you trouble right now but I recommend going over the various methods on the below article and see which one works for you:
In summary, you can install directly from Marketplace, or download the file from Marketplace and upload to your instance. This is provided you're using Jira Server.
👋 Hi there Jira Community! A few months ago we shared with you plans around renaming epics in your company-managed projects. As part of these changes, we highlighted upcoming changes to epics on...
Connect with like-minded Atlassian users at free events near you!Find an event
Connect with like-minded Atlassian users at free events near you!
Unfortunately there are no Community Events near you at the moment.Host an event