Hi Tiago,
This was caused by an incompatibility due to a new release of MABS:
https://success.outsystems.com/Support/Release_Notes/Mobile_Apps_Build_Service#MABS_Version_4.1
I will need to change the plugin. Meanwhile, can you check in your environment if you have the option to choose one specific MABS version, as described here?
If you are able to choose MABS Version 4.0, you will be successful.
I will let you know when there is a new of plugin.
Best regards,
Daniel Martins