Studio 2020.4.4 issues: 'Failed to create a 'OutArgument' from the text

[alessio.giovannini]

Hello all,

Is there any issue with the Studio 2020.4.4? During this morning it already happened two times that I had to recover a previous version of the project because after few changes the workflow is not opening anymore and when I try to open I get the message

‘Failed to create a ‘OutArgument’ from the text ‘’.’ Line number ‘1’ and line position ‘82’. Row: 1, Column: 82

Is that possible?

The workflow continues to show that there is one missing argument but when I open the window all arguments have been provided.