To what extent is the claim of the contemporary Hadith scholar (Al-Albani) valid that Kishk and Al-Ghazali narrate Hadiths that have no basis, and what is the ruling on warning against their lectures which corrupt the creed of Muslims?

It is neither just nor wise to cancel the valuable lectures or lessons of a scholar due to an error in reasoning or the mention of weak hadiths. The questioner should be keen to seek knowledge and occupy themselves with what benefits them, and not involve themselves in the disputes of scholars.