"Due to him being prone to mistakes"

Shaykh Al-Awamah writes:

ولم يكونوا يلتفتون إلى من لم يكن له شيوخ في العلم، ولا يقيمون له وزناً ولا إعتباراً ، ولا يرون فيه أهلية التكلم معه ، لانه محل الخطل والغلط

ENGLISH:

"And they (the ‘ulama) never used to pay attention to one who did not have shuyookh (teachers) in al-ilm (studies), and such an individual had neither value nor a status in their eyes. In fact, they wouldn't even consider such a person worthy of being spoken to (in matters of knowledge) due to him being prone to mistakes".

NEDERLANDS:

"En zij (de ulama) zouden nooit aandacht schenken aan iemand die geen shoyoekh (leraren) heeft gehad van wie hij Al 'Ilm (kennis) heeft genomen, en zo'n iemand had waarde noch status onder hen. Zij beschouwden hem niet eens waard om tegen gesproken te worden, omdat hij stellig in blunders en fouten zou vallen".

["Adabul-Ikhtilaaf", 144].