Error opening page
When i open my wifi connection i cannot connect instead a message from captive.apple.com appears that says "Error opening page. Hotspot login cannot open the page because too many redirects occured.
iPad Pro, iPadOS 13
The captive.apple.com error suggests that you are trying to access the internet from a public WiFi hotspot; the URL is used by the iPad to detect internet connectivity. Errors relating to the address generally indicate a failure to authenticate the user via the hotspot operator’s paywall/terms page - prior to granting internet connectivity.
The too many redirects notification is generally something else entirely. This support page provides appropriate guidance:
If Safari can't open the page because too many redirects occurred - Apple Support