March 31, 2020 marks the end-of-life date for LINE Front-end Framework (LIFF) v1 Server API. On that date, these features will be removed:
Use the latest version of LIFF
As announced on October 16, 2019, LIFF v1 will be discontinued.
# Use LIFF v2
All discontinued Server API functions can be used in LINE Developers Console. For more information on how to add a LIFF app to a channel, read this:
You can use other features with the same process.
LINE will continue to improve the quality of its services. Thank you for your understanding.