Backend error 503 second tasklist at google account

I use two task lists at my google account. I have a google apps business acoount. Now i get a error if eM Client sync the tasks. The error is “503 Backend error” if eM Client sync the second task list.

Hello,
what version of eM Client are you using?

eMClient 4.0.15145.0

Send us your GData logs please. Go to Tools - Settings - Logging and check GData. CLose the window, wait until the error message appears (simulate the issue) and send us the log using the same logging settings window. Thank you.

i send you the log via Email from eMClient directly.

We have received it and are currently working on it.

Hello,
any new information about this problem?

No, unfortunately our developers are still trying to find a solution/workaround.