Mobile APP build issues

[mikedorin]

There are several problems in building the mobile application

First problem is:
flutter pub get
Resolving dependencies...
The lower bound of "sdk: '>=2.7.0 <3.0.0'" must be 2.12.0'
or higher to enable null safety.

The current Dart SDK (3.7.2) only supports null safety.

After message with the yaml file, I do a
flutter pub upgrade --major-versions
Resolving dependencies... (1.4s)

For the most part that works, but it gripes a bit:
Changed 145 dependencies!
3 packages are discontinued.
13 packages have newer versions incompatible with dependency constraints.
Try flutter pub outdated for more information.

Finally flutter packages pub run build_runner watch --delete-conflicting-outputs
Spits out a couple of these:
INFO] Running build completed, took 18.4s
[INFO] Caching finalized dependency graph completed, took 196ms
[SEVERE] Failed after 18.7s

Then hangs...

Are there any updates on the mobile app?

Thank you,
Mike