There is nothing wrong with your grammar. The grammar checker incorrectly believes you have made an error in plurality between misinterpretations and seems, when in fact the verb seems is tied to the gerund using.
This is evidenced by the three suggestions it offers: making misinterpretations singular; making seems plural; or making misinterpretations into a possessive.
However, if you add the word from in front of accelerometer, then the grammar checker might better understand your sentence.