Hi @999
welcome to the forum. Astonishing that the username "999" was still free
For explaining what the problem really is:
A pre-condition is that you post your complete sketch as a code-section.
There are hundreds of possible reasons that can cause that.
Nobody here wants to write down a 200 reasons "no-WiFi-connection" tutorial
and you don't want to read it.
Follow this short tutorial to post your sketch. Reading time 3 to 5 minutes.
Posting time : 30 seconds.
best regards Stefan