Can not Withdraw rewards

I have an issue here…I can not withdraw my rewards in Yoroi or Adalite.
Before start of epoch 233 I withdrew my rewards and deregistered staking key at the same time.
In the begining of epoch 233 I got reward but can not withdraw it because WITHDRAW button has gone.
I have 10ADA for fees.

In current epoch 233 I’ve registered and delegate again to the same pool and Withdraw button showed up but I get an error.
How can I get remaining rewards?

I think I read somewhere that if you deregister you cannot get further rewards. Think they are gone.

The message means that the server has problems. (If you are using a lite wallet like Yoroi or Adalite it has to connect to a server.)

It seems that this happens more often when an epoch is coming to an end. Only solution at the moment: try again later.