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Upgrading hardware from arduino ethernet shield to arduino ethernet 2 shield

Hello,
The hardware I am using is Arduino Mega 2560 Rev3 and Arduino ethernet 2 shield W5500. I used to run my project with arduino ethernet shield and now I upgraded it to arduino ethernet 2 shield. The project I am running is created only by the app. I have no sketch created by me and uploaded in arduino, only the basic from blynk examples Arduino_Ethernet2 for communication with blynk server.
The problem is when I changed the communication board and uploaded the Arduino_Ethernet2 sketch it is not connecting with the app when I am using my project.
Than you

you don’t have to change anything. the Arduino Ethernet library works with Ethernet2 shield too (already 2 years now)