It looks like even they don’t know when the crisis <is over> vs <will be over>

[Tony_M]

The dialogue is mine.

A: When will the market situation change?
B: That’s a difficult question. The real estate crisis has definitely affected the market, and it remains the main factor that’s causing instability right now. The leading experts are reluctant to make prognoses; it looks like even they don’t know when the crisis is over.

Can I use either the present simple or the future simple in the when-clause?

 

[5jj]

it looks like even they don’t know when the crisis is over.

That is incorrect. You need ... when the crisis will be over.

 

[Tony_M]

That is incorrect. You need ... when the crisis will be over.

Corpus of Contemporary American English:
- I look forward to the time when all of our debts and responsibilities are paid.
- History is the past, so let's look forward to the time when all people will be blessed.
What's the difference here?