At the ConTeXt intro workshop last Wednesday, participants struggled with ConTeXt on the newly released TeX Live 2026.
Not the usual about wrong paths or unwritable cache directories.
ConTeXt was apparently correctly installed, generating the file database and the format was working, but then it couldn’t find the format file if the "context" or "mtxrun" command wasn’t called with its full path.
TeX Live’s processes were changed before this release and something’s broken.