Why I can not upon Snapchat on my phone

Does the app not open or does the app open, but you can't sign in?

Some things you can try. Do you have access to another WiFi network where you can try? That has worked for several people.

Try a restart.

Restart your iPhone   *

Restart your iPad.   *

Try a forced restart. See the section towards the end of the article.

Reset Device. -

Snapchat Support is a 3rd party app.

Reach out to Snapchat Support -> https://support.snapchat.com/en-GB/article/account-questions

Snapchat Support hate VPN.