[ST] call revert exception Ethereum to BNB USDT

[Tommy-R8]

Describe the bug
A user is getting a call revert exception when trying to bridge USDT from Ethereum to BNB Chain
call revert exception [ See: https://links.ethers.org/v5-errors-CALL_EXCEPTION ] (method="allowance(address,address)", data="0x", errorArgs=null, errorName=null, errorSignature=null, reason=null, code=CALL_EXCEPTION, version=abi/5.7.0)
Could having no ETH balance be the cause for this?
User is on Metamask mobile using the bridge through the built in dapp browser

Where did the user initiate this transfer?
Connext UI

Link to ticket in intercom
https://app.intercom.com/a/inbox/qge2vd8z/inbox/shared/all/conversation/1436?view=List