SQX137RC4: Builder - Improve ex. str - THEN - more than one action error

I create strategy in AlgoWizard – no template.

Entry conditions in THEN part contains 3 action Assign Variable and then action Enter At Market.

Strategy has 2 timeframes and using actions Assign variable I calculate ATR form higher timeframe and SL and PT.

I use builder – Improve existing strategy to improve my strategy.

Fast after start I got error information:

Error while running project 'Builder'.

Strategy doesn't have standard format - THEN part contains more than one action!

And improving is stopping

Should be possible to improve complicated strategies.