Uploadable : The 'Utils.File' type needs to be updated to implement `TypeInterface`.

[ZebboKlaufix]

Cake 3.6 generates multiple deprecation notices. Most of them are easy to fix as they just need to add a set or get. But one of them could not be fixed by me.
Maybe you have a fix, idea or hint:

Deprecated (16384): Using Type::_basicTypeCast() is deprecated. The 'Utils.File' type needs to be updated to implement TypeInterface. - /htdocs/my_project/vendor/cakephp/cakephp/src/Database/Type.php, line: 273
You can disable deprecation warnings by setting Error.errorLevel to E_ALL & ~E_USER_DEPRECATED in your config/app.php. [CORE/src/Core/functions.php, line 310]

Is there any chance to get a update for the whole cacephp-utils package? It's an awesome collection but not fully compatible with cake 3.6.

Best regards

[Casmo]

For those still coming from google:
Probably one of your custom Database Types (found in \App\Database\Type) does not have the mandantory functions found in Cake\Database\Type\TypeInterface.