Problem Solved Guys. Thank you for your response
the cause of error is in sdkbok_config.json . is the default sdkbox_config.json can not be used? i just edit the interstial ads . Then i replace from “SDKBOX_SAMPLE_ADMOB” and rewrite the code in interstial ads. and finally succes
BTW, when i try to show ads in simple Helloworld.cpp , the ads is showed althought i use default sdkbox_config.json (i rewrite the banner ads code). is the code must not be share to other? or is safe to share my sdkbox_config?