It isn't an error, you need to change the way you had written. Actually, in this application the software /system has been been developed in such a way that it doesn't allow some words, a way of writing (eg- if you write 'he did not help me' it would show that you are being rude and you need to change it to 'he was not able to help me. All these together are forbidden language according to this system and that's why it shows like this.
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Answer:
It isn't an error, you need to change the way you had written. Actually, in this application the software /system has been been developed in such a way that it doesn't allow some words, a way of writing (eg- if you write 'he did not help me' it would show that you are being rude and you need to change it to 'he was not able to help me. All these together are forbidden language according to this system and that's why it shows like this.