A problem occurred configuring project ':blue_thermal_printer'.

[mohammadunnabi]

Could not create an instance of type com.android.build.api.variant.impl.LibraryVariantBuilderImpl.
Namespace not specified. Specify a namespace in the module's build file. See https://d.android.com/r/tools/upgrade-assistant/set-namespace for information about setting the namespace.

 If you've specified the package attribute in the source AndroidManifest.xml, you can use the AGP Upgrade Assistant to migrate to the namespace value in the build file. Refer to https://d.android.com/r/tools/upgrade-assistant/agp-upgrade-assistant for general information about using the AGP Upgrade Assistant.

[mohammadunnabi]

Failed to query the value of property 'buildFlowServiceProperty'.

Could not isolate value org.jetbrains.kotlin.gradle.plugin.statistics.BuildFlowService$Parameters_Decorated@5722b630 of type BuildFlowService.Parameters
A problem occurred configuring project ':blue_thermal_printer'.
> Could not create an instance of type com.android.build.api.variant.impl.LibraryVariantBuilderImpl.

[probuse]

@mohammadunnabi
Clone the blue_thermal_printer repository into a folder called packages(located in the same folder as pubspec.yaml)
the add blue_thermal_printer like shown in the image below in your pubspec.yaml

Then add name space in build.gradle for blue_thermal_printer as shown in the image below

Then run flutter clean

[vijayvaghela72]

@mohammadunnabi Clone the blue_thermal_printer repository into a folder called packages(located in the same folder as pubspec.yaml) the add blue_thermal_printer like shown in the image below in your pubspec.yaml Then add name space in build.gradle for blue_thermal_printer as shown in the image below Then run flutter clean

Thanks