"The method exp_syncing does not exist/is not available"

[ID453543435]

System information

Gexp version: gexp version
VERSION:
1.6.6-beta-5757b6f7

OS & Version: Windows/Linux/OSX
Windows
Commit hash : (if develop)
5757b6f ?

Expected behaviour

Actual behaviour

"The method exp_syncing does not exist/is not available"

Steps to reproduce the behaviour

start gexp.exe --datadir "..\Expanse" --syncmode "full" --rpc --rpcapi "admin,eth,exp,miner,personal,rpc,txpool,web3"

erroor:
"The method exp_syncing does not exist/is not available"

Backtrace

[backtrace]

[ID453543435]

1.6.1 same problem

[ID453543435]

DEBUG[09-02|08:18:55] HTTP registered *node.PrivateAdminAPI under 'admin'
DEBUG[09-02|08:18:55] HTTP registered *node.PublicAdminAPI under 'admin'
DEBUG[09-02|08:18:55] HTTP registered *node.PublicWeb3API under 'web3'
DEBUG[09-02|08:18:55] HTTP registered *ethapi.PublicEthereumAPI under 'eth'
DEBUG[09-02|08:18:55] HTTP registered *ethapi.PublicBlockChainAPI under 'eth'
DEBUG[09-02|08:18:55] HTTP registered *ethapi.PublicTransactionPoolAPI under 'et
h'
DEBUG[09-02|08:18:55] HTTP registered *ethapi.PublicTxPoolAPI under 'txpool'
DEBUG[09-02|08:18:55] HTTP registered *ethapi.PublicAccountAPI under 'eth'
DEBUG[09-02|08:18:55] HTTP registered *ethapi.PrivateAccountAPI under 'personal'

DEBUG[09-02|08:18:55] HTTP registered *eth.PublicEthereumAPI under 'eth'
DEBUG[09-02|08:18:55] HTTP registered *eth.PublicMinerAPI under 'eth'
DEBUG[09-02|08:18:55] HTTP registered *downloader.PublicDownloaderAPI under 'eth
'
DEBUG[09-02|08:18:55] HTTP registered *eth.PrivateMinerAPI under 'miner'
DEBUG[09-02|08:18:55] HTTP registered *filters.PublicFilterAPI under 'eth'
DEBUG[09-02|08:18:55] HTTP registered *eth.PrivateAdminAPI under 'admin'
DEBUG[09-02|08:18:55] HTTP registered *eth.PublicEthereumAPI under 'exp'
DEBUG[09-02|08:18:55] HTTP registered *eth.PublicMinerAPI under 'exp'
DEBUG[09-02|08:18:55] HTTP registered *downloader.PublicDownloaderAPI under 'exp
'
DEBUG[09-02|08:18:55] HTTP registered *filters.PublicFilterAPI under 'exp'
INFO [09-02|08:18:55] HTTP endpoint opened: http://127.0.0.1:9656