You can replicate this today without an upgrade being available
Take Joomla 4.0-dev or 4.0.0 beta1 or 3.9.19
Login as a super admin
Go to System -> Joomla (under update menu)
Upload a PNG FILE instead of a Joomla package zip file. (bug #29763 allows you to upload this)
Click upload and install
Provide valid credentials
You will then see
Click close
A pathway forward, a "return to admin" button? a menu item that can be click? Something other than nothing.
You are now stuck at a page with nothing clickable, no next step, no where to go
Joomla 3 has same issue
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Status | New | ⇒ | Closed |
Closed_Date | 0000-00-00 00:00:00 | ⇒ | 2022-03-06 21:19:30 |
Closed_By | ⇒ | PhilETaylor | |
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PR for J3 is in progress: See #29884 . I leave this issue open until the PR is ready.
When it once will be merged into J3, it later will be merged up to J4 with the regular upmerge cycle.