Your topic has been moved. Please do not post in "Uncategorized"; see the sticky topics in https://forum.arduino.cc/c/using-arduino/uncategorized/184.
Your topic is lacking any detail; please read How to get the best out of this forum.
Among the missing details (but not limited to)
- Which Arduino?
- Which web can't you connect to? Arduino Cloud or are you talking about the Arduino Create Agent or something else?
- Which instructions are you following; please provide a link.
- Your code is probably relevant; please read up on the use of code tags in How to get the best out of this forum.
- Any other details that you can think of.