Interop fails on transferFrom EVM contract to Scilla on prototestnet

[DrZoltanFazekas]

User reported following issue using the recently patched ScillaConnector Library:

If I try to call transferFrom from another EVM-Contract after I approve an amount from this EVM-Contract as spender I try to call a function which is delegate transferFrom I got an Error

Uncaught (in promise) Error: missing revert data (action="estimateGas", data=null, reason=null, transaction={ "data": "0xa694fc3a0000000000000000000000000000000000000000000000000000000005f5e100", "from": "0x158517A8E13e93965e4Ee6fd894984d7fcC9B1bB", "to": "0x2156Ad54CE302E4088F9689e34DB524423aCef47" }, invocation=null, revert=null, code=CALL_EXCEPTION, version=6.13.4)

If I remove require(success); in ScillaConnector.sol. from it works but no transfer happens.

Furthermore, the bool success variable is declared twice in the function readString(): https://github.com/Zilliqa/zilliqa-developer/blob/main/contracts/experimental/ERC20ProxyForZRC2/contracts/ScillaConnector.sol#L197