Unityでadmobを表示

Unity(5.3.5f1)でアンドロイド向けアプリを開発しており、広告でadmobを表示しようとしています。
Unity用のadmobプラグイン(3.0.0)をUnityにインポートしました。

インポートはうまくいき、実機にビルドしたところ以下の様なエラーが出てしまいます。
検索すると英語のサイトばかりで、いろいろ試して入るのですが改善されません。
どなたか改善策等ご存知でしたら、ご教授頂けますと幸いです。

stderr[
C:\Users\user\Desktop\ExampleGames\Temp\StagingArea\android-libraries\facebook\res\drawable-ldpi\com_facebook_close.png: liC:\Usbpneg wrs\user\Dearnsktop\1ing: 0iCCP0a: Noppst recogniz_ing kCheburashka\nowTemn p\StsRGagingAreaB \prandroofiidl-elibraries\ faceboothk\resat \drhaawas bblee\com_faen ceedbooitC:\Userek_ds\
jculmopseei\.Dpnegsk:t olpi\1b0p0nagp pwsar_nCihenbgu:ra shikCaC\PT:e mNpo\tS traegcionggnAirzeinag\ aknndorwon isdR-GlBi bprroarfiielse\ fthaacte bhoaoks\ rbeeesn\ derdaiwtaebdle
-hdpi\com_facebook_close.png: libpng warning: iCCP: Not recognizing known sRGB profile that has been edited
C:\Users\user\Desktop\ExampleGames\Temp\StagingArea\android-libraries\facebook\res\drawable-xhdpi\com_facebook_close.png: libpng warning: iCCP: Not recognizing known sRGB profile that has been edited
C:\Users\user\Desktop\ExampleGames\Temp\StagingArea\android-libraries\LobiCore\res\drawable-hdpi\lobi_btn_s_g_white.9.png: libpng warning: iCCP: Not recognizing known sRGB profile that has been edited
C:\Users\user\Desktop\ExampleGames\Temp\StagingArea\android-libraries\LobiCore\res\drawable-xhdpi\lobi_btn_sC_g_white.:9.png\U:sers\ lijumpbpeing\D warningesk: top\iCC1P: No0t reco0apgnps_iCzing khenown busRGBra sprofhika\Tele thmat p\hSas tbeen edited
agingArea\android-libraries\LobiCore\res\drawable-hdpi\lobi_btn_s_g_white_on.9.png: libpng warning: iCCP: Not recognizing known sRGB profile that has been edited
C:\Users\user\Desktop\ExampleGames\Temp\StagingArea\android-libraries\LobiCore\res\drawable-xhdpi\lobi_btn_s_g_white_on.9.png: libpng warning: iCCP: Not recognizing known sRGB profile that has been edited
C:\Users\user\Desktop\ExampleGames\Temp\StagingArea\android-libraries\LobiCore\res\drawable-hdpi\lobi_btn_s_green.9.png: libpng warning: iCCP: Not recognizing known sRGB profile that has been edited
C:\Users\user\Desktop\ExampleGames\Temp\StagingArea\android-libraries\LobiCore\res\drawable-xhdpi\lobi_btn_s_green.9.png: libpng warning: iCCP: Not recognizing known sRGB profile that has been edited
C:\Users\user\Desktop\ExampleGames\Temp\StagingArea\android-libraries\LobiCore\res\drawable-hdpi\lobi_btn_s_green_on.9.png: libpng warning: iCCP: Not recognizing known sRGB profile that has been edited
C:\Users\user\Desktop\ExampleGames\Temp\StagingArea\android-libraries\LobiCore\res\drawable-xhdpi\lobi_btn_s_green_on.9.png: libpng warning: iCCP: Not recognizing known sRGB profile that has been edited
C:\Users\user\Desktop\ExampleGames\Temp\StagingArea\android-libraries\LobiCore\res\drawable-hdpi\lobi_btn_s_white.9.png: libpng warning: iCCP: Not recognizing known sRGB profile that has been edited
C:\Users\user\Desktop\ExampleGames\Temp\StagingArea\android-libraries\LobiCore\res\drawable-hdpi\lobi_btn_s_white_on.9.png: libpng warning: iCCP: Not recognizing known sRGB profile that has been edited
C:\Users\user\Desktop\ExampleGames\Temp\StagingArea\android-libraries\LobiCore\res\drawable-xhdpi\lobi_icn_login_white.png: libpng warning: iCCP: Not recognizing known sRGB profile that has been edited
C:\Users\user\Desktop\ExampleGames\Temp\StagingArea\android-libraries\LobiCore\res\drawable-hdpi\lobi_icn_menu_ranking.png: libpng warning: iCCP: Not recognizing known sRGB profile that has been edited
C:\Users\user\Desktop\ExampleGames\Temp\StagingArea\android-libraries\LobiCore\res\drawable-xhdpi\lobi_icn_notification_type_default.png: libpng warning: iCCP: Not recognizing known sRGB profile that has been edited