After the update to Matomo 4.9 it appears in an almost complete empty view in Firefox, Chromium and Safari. Only the mobile version is still normally working.
After the upgrade to Matomo 4.9.1, my Matomo view became also intact again on older computers and slightly older browser versions of Chrome and Safari.
But keep in mind that these browsers are not really slightly older, but have not received any updates since at least the middle of 2020 meaning that they have a huge list of unfixed and well known security vulnerabilities and should therefore no longer be used to connect to the internet.
So I will have to find a solution für my Linux Chromium browser. I am optimistic for that.
On my good old Apple Ipad I am using the latest available software. As much as I remember it was upgraded only some weeks ago. Normally I would think that Safari as part of that software should also be up to date.