Only one of these can be installed: illuminate/support[v5.6.0, ..., 5.8.x-dev, v6.0.0, ..., 6.x-dev, v7.0.0, ..., 7.x-dev, v8.0.0, ..., 8.x-dev, v9.0.0-beta.1, ..., 9.x-dev], laravel/framework[v9.0.0-beta.1, ..., 9.x-dev]. laravel/framework replaces illuminate/support and thus cannot coexist with it
Problem 1
Commenting out: "laravel-frontend-presets/tall": "4.0.0"
Resolves the issue, as in composer updates fine, but then the app stops working, of course.
Solution: Update dependency to Illuminate/Support 9?