Hi Erel.
is independent of windows version this morning i tried also on windows 7 professional (the movie yesterday on windows 10).
The same error as you see.
In attachment the example.
The steps:
1.Open project test.
2. In "Quick Search" write "acti"
3. You have all string that found there and in last record you have
Select last record ( in automatic open act_test activity ):
Close act_test, come back in "Quick Search" and you have this error:
If you need another things, pls contact me.
Have nice day