companion Error

 I'am trying to create a new app and connecting my android phone through wifi by connect >all Companion .  After scanning QR code or typing Qr code i got the following error 
Companion Connection Error:why the my android phone is not connecting?

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There are many possible reasons.

1) Do you have the latest version of Companion downloaded from Google Play and installed on your phone?  Use Companion 2.23ai2zx1  

2) Is this a project you code your self and if so, has it loaded correctly before?    If so, 

One of the following  probably applies to your code (all may not apply to your code):

1)  You have coding errors in your blocks.  In the Blocks editor, look in the lower 

left for the yellow and red triangle icons.    If the red icon has a value larger than 0, 

you have a serious coding error.  Find the block in your code that has a red triangle and 

fix it.   Red triangles always inhibit creating an apk or running a project in the 

emulator or possibly creating an aia file.     Yellow triangles are more forgiving, 

however, sometimes, these need to be fixed because they trip an internal warning and 

you do not get a compile, so fix the yellow triangles too.

2) Your source file (the aia file) is larger than the 5Mb limit allowed in AI2 or you 

put images or other resources in your Media (resources) that you do not use in the app. 

 All the images and sounds in resources count toward the 5Mb limit.    You can program 

apps larger than 5Mb in the browser, but they will not compile and might not run in the 

emulator or the project may not save as an aia. If this is the case you need to reduce 

the size of your image and/or sound files.   Most image files can be made quite small 

by resizing them using a photo manipulation program on your PC to less than 50Kb each.

3)  You might have more than 10 Screens in your app.  AI2 becomes unstable when more 

than ten screens are used.

4) You might have set a Screen icon in the Designer Properties for your project that is too large. Use an image 

sizeof 48x48 px or 96x96px instead and only use jpg or png images.  *.ico files are not 

supported.

5) You did not code the entire project using App Inventor 2.   If you used one of the 

third-party AI2 clones,you might not be able to load a Project into the AI2 compiler or 

create an apk with the standard AI2.

6) If you incorrectly modified the project's Manifest files, you may have issues.

7)  Sometimes, if you have LOTS of Layouts on a single screen,  the apk might not 

compile.

8)  or the network you are using is overloaded (possibly a school network), or you have other applications running in the background, or your virus checker is doing a scan.  Sometimes, just trying a few minutes later will give you a more favorable response.

9) if you have BlueStacks on your home PC.  The emulator on AI2 cannot run unless BlueStacks is disabled and all of its processes are shut down.

10)  Are you using Sensor controls (except for the clock)?   Most Sensor controls or controls related to sms or the phone do not work in the emulators.  They need to be tested on a device.

The problem could be something else, like running an old version of Companion ...in this instance,   Projects > Hard Reset (if running in the emulator)  , then if there are issues a pop up will appear (if no issues, nothing will happen...just smile).  When the pop up appears, follow the instructions very carefully, then reboot your PC and try again.

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