Fix my Flutter errors -- 3

Here is the current tasks, please check:

Fix the APIs in my flutter app and make app fully functional like the website: www.orkt.one. APIs have been added, but some errors showing.
Here is all the modules to fix:

A. Dashboard (Total worth, Portfolio, Timeline/Blog)
B. Deposit
C. Withdrawal
D. Trade (from search to review. Use latest UI)
E. Coin Exchange
F. Send money/gift cards etc. Here are the external APIs:
https://developers.tremendous.com/reference/rewards - Prepaid Cards
https://www.coinpayments.net/apidoc - Cryptocurrencies
https://docs.snappygifts.com/#/paths/~1v1~1gifts/post - Branded Gifts
https://cockpit.sumsub.com/ - Verification
https://secure.getborderless.com/ - Bank Deposits)
G. Chat
H. Timeline/Blog
I. Notification
J. Referral
K. My Profile (Fix UI, follow function, reviews, offer list)
L. Settings
M. KYC

Test APK: https://we.tl/t-BRoqxsJogD
Budget: $200-$250