Google sheets. Problem with conditional cell formatting?

Question

Google Sheets

How can I make the cells color when my condition is met?
Cells in the range B5:C19 should be colored
Formula used:
= SUM (B26: B27) = 2
Tried through IF, through AND and through INDIRECT. Doesn't want to work.
Could it be that I am trying to get the value of a cell from another sheet?

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Answer 1

conditional formatting cannot link to another sheet