Grammatical error in personal statement

Ive sent off my application but when I was reading through it today I realised there was a SPAG error…
In the references I gave I managed to miss out the ‘l’ in ‘et al.’ Im not sure how I managed to miss this out, I passed it through my careers teacher, geography teacher and 4 friends and none of us managed to find this (oh and grammarly).Im really freaking out now because one of the universities I applied to is LSE for BA Geography they’ve sent out a few rejection letters due to grammatical errors. Would this error hugely disadvantage me?

When you say, "they’ve sent out a few rejection letters due to grammatical errors", are you saying that LSE actually state that the reason they opted not to make an offer was due to grammatical errors in the personal statement? Or is this an assumption someone's making?

They stated it a as the reason for the rejection so Im really panicking. But it was for some highly competitive courses but Im not sure if that makes any difference

Ive sent off my application but when I was reading through it today I realised there was a SPAG error…
In the references I gave I managed to miss out the ‘l’ in ‘et al.’ Im not sure how I managed to miss this out, I passed it through my careers teacher, geography teacher and 4 friends and none of us managed to find this (oh and grammarly).Im really freaking out now because one of the universities I applied to is LSE for BA Geography they’ve sent out a few rejection letters due to grammatical errors. Would this error hugely disadvantage me?