App hider and cloner not working since upgrade to Android 11

I am using a calculator app that have other apps such as what's app and allows them to run a 2nd copy in a hidden environment. Since upgrading to Android 11, I am getting a "Generate optimize apk failed" error. The program is apparently open source, I think. Here are screenshots attached for the app. Can you please help me getting working again, then I would like to create an ad free app with many improvements if possible?

Навыки: Android, Mobile App Development, Java, Архитектура ПО, Программирование на C#

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О работодателе:
( 11 отзыв(-а, -ов) ) Old Bridge, United States

ID проекта: #27520906

4 фрилансеров(-а) готовы выполнить эту работу в среднем за $188


Hi there, Thanks for the chance to bid your project. I understand that you want an expert Mobile developer to help you to completely finish your project. So.. you want the project to have a logical flow, be interestin Больше

$300 USD за 7 дней(-я)
(15 отзывов(-а))

Hello there, I've checked that you are facing issue with "Generate optimize apk failed" issue. I can provide you the solution of it, if you could give me the chance to work on your project. I am ready work with you a Больше

$250 USD за 7 дней(-я)
(14 отзывов(-а))

Hello, I read your description and looked images carefully. I have plenty experience of android app development. I will upgrade your project to Android 11 successfully by Sunday evening. I hope you contact me.

$100 USD за 1 день
(1 отзыв)

Dear Manager, I have gone through your job requirement,I have 8 years’ experience in Software development industry. I have done lots of project in lots of technology like PHP, .NET MVC, JAVA, MOBILE PLATFORM LIKE A Больше

$100 USD за 7 дней(-я)
(1 отзыв)