How can I correctly send two base64 strings of two different screenshots via ajax?

Hi.

I'm trying to take two different screenshots and convert their binary data to base64, save it to variables, and send it via ajax to a php file that converts those base64 values ​​to .jpg images.

I have managed to get those values ​​to be sent from the Construct and received by the php file, but the problem is that only one image is generated correctly (which is the value of the first variable I send) but the second image is generated blank.

Apparently I am sending the values ​​incorrectly, since the php file only gets a single value (the image which is successfully generated)

I hope you can take a look at my code and help me. Thanks in advance

c3p file:

https://www.mediafire.com/file/bhmptydetp048qv/Screenshot.c3p/file

Screenshots:

Code that contains the php file: