What is the meaning of the word "maqbul" in the book al-Taqrib by al-Hafiz Ibn Hajar?

The Shaykh : As for the term "maqbul" in the book "al-Taqrib" by al-Hafiz Ibn Hajar, it is a term specific to his book first, and it is an unusual term second; because the meaning of "maqbul" is "not maqbul." Have you seen such a term? The meaning of "maqbul" is "not maqbul." The issue is resolved by explaining what he said in his definition of "maqbul." He said: "If the narrator has only a small amount of hadith and he has not been criticized or declared unreliable, then I say of such a person: he is maqbul with the support of a corroborating chain." This condition makes the maqbul not maqbul when there is no corroborating chain. What we observe in practice is that we find many narrators who narrate some hadiths, and among them are those about whom al-Hafiz Ibn Hajar said: maqbul. So we research and research and research, and we find no corroborating narration or supporting chain for the hadith. So at that point, we say: al-Hafiz Ibn Hajar said: maqbul, and he means that it is not maqbul; because it has no supporting chain. And the hadith, my dear, has those defects, and they are maqbul with al-Hafiz Ibn Hajar; meaning not maqbul!!
There is no god but Allah.

The questioner : ... .