@ivan_moreno I need to confirm that the extension is causing this. Could you remove the extension from your project and try building again?
Unfortunately I can’t do anything about this, see also chapter 3.2.3 of the Extensions document
… the external libraries (jar files) must be unique across projects. If a project imports several extensions, then two different extensions cannot import the same jar file.
Taifun
yes, unfortunately after the latest Makeroid update the Google Pick Account extension is not compatible anymore with Makeroid, because both use the Google Play Services library. I will add a note on my webpage
Thank you @ivan_moreno for finding it out…
Taifun
I already did, without the extension builds correctly.
now it works ?
you’re welcome, thank you for your excellent extensions
Thanks to @Taifun releasing the source code for this extension, I’ve just implemented this as a Makeroid component. It’ll be available in the next release. 
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No problem, that’s great news :).
Maybe we can compile your extension with Makeroid, so that you can put it on your website
The source code of the Pick Google Account extension is now available on my webpage
You now could use that code to create a component out of it…
Enjoy!
Taifun
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Thanks! I will create an extension today. Check if it works and then send it to you.
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TaifunZip and Storage 'FILE" incompatible.
But zip, integrated in File.
Thanks, good Work Makeroid 
Same probable issue in my build app…pls help us…what’s build my app…remove the error
Just read the topic and advise given there.
dx execution failed …pls some help
if you don’t want to follow the advise given to you nobody will want to help you.
It’s not easy helping you with this little information, as there is 100 things that could be wrong, so read through below post
but if I would guess, you have to much of something 
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