Some of the surveys provided by tap surveys make http requests instead of https, Android by default doesn't allow this unless the app itself allows it. This make it impossible to complete some surveys, sometimes after spending 20 minutes on one only to have it fail at the end.
See this stackoverflow page for more info:
https://stackoverflow.com/questions/54752716/why-am-i-seeing-neterr-cleartext-not-permitted-errors-after-upgrading-to-cordo