Changed Polish text using the Loco Translate plugin or through direct file editing does not appear.

[dariuszwit]

We want to change the default text on the page from:

"Najniższa cena w ciągu ostatnich 30 dni"

To:

"Najniższa cena z ostatnich %d dni przed promocją."

The change was made using the Logo Plugin, and it was applied to the file:

/public_html/wp-content/languages/plugins/omnibus-pl_PL.po

However, the text on the product page did not change.

Where could the error be?