Appy Builder Build failed! Connection refused (Connection refused)

Today, I open the appy builder project and click build an app for save .apk in my pc but the massage show " Build failed! Connection refused (Connection refused) " 

Then I go to the community ( https://community.appybuilder.com/ ) and found the cause of the build failed.

Dear AppyBuilder members,

We would like to announce  that starting August 1st, we will mainly focus on open-source and off-line versions and will temporarily  shut-down AppyBuilder. This temporarily shut-down, will allow us to:

• Concentrate on addressing the current issues,
• Upgrade API version to use latest API version; e.g. 28
• Push updates to executable off-line and open-source versions
• Work on enhancements and additional features
• Work on other product/services that we have been working on, for completion and making it publicly available
• Find alternatives for our AdMob account since starting many months ago, our AdMob account faced issues due to excessive number of apps that were published to Play Store that were violating AdMob ToS
• Work on new AppyBuilder online version targeted for 1st quarter of 2020

What this means to you? 

• Starting August 1st, we will shut-down our build-servers, meaning you will not be able to build .apk - by Aug 1st, we will attempt to update AppyBuilder to support API 28
• You will still be able to log into AppyBuilder and download your .aia through August 31st
• You will be able to export  your keystore, .aia and use them in offline version
• You will be presented with a brand new AppyBuilder (date  ) when work is complete
• On September 1st, we will also close the online-version
• You will still be able to use CodeEditor - however, there might be some modifications
• Community forum will continue to be open for discussions / questions

Regards
AppyBuilder