Yesterday you had this problem on the main server Help cant package an apk because server error could not build target please try again later
Now you are using the code server
Did you follow tip 2 meanwhile?
When exactly do you get that error?
Did you try to build the app and test the apk file?
It would really help if you provided a screenshot of your relevant blocks, so we can see what you are trying to do, and where the problem may be.
To get an image of your blocks, right click in the Blocks Editor and select "Download Blocks as Image". You might want to use an image editor to crop etc. if required. Then post it here in the community.
Taifun
Trying to push the limits! Snippets, Tutorials and Extensions from Pura Vida Apps by 
Taifun.