When i use one of my functions situated in vuex js file, this error appear in the console.

Here's the code of the function in the vuex js file :

mutations: {
    getPdfByReportId(reportId)
    {
        axios(
        {
            url:"http://localhost:9080/api/pdf/"+reportId,
            method:"GET", 
            responseType:'blob'
        }).then(response => 
        {
            //Download the pdf
            const blob = new Blob([response.data], { type: 'application/pdf' })
            const link = document.createElement('a')
            link.href = URL.createObjectURL(blob)
            link.download = "report.pdf"
            link.click()
            URL.revokeObjectURL(link.href)
        });
    },

and here's where i use it :

<v-icon style="cursor:pointer;" class="rounded-circle" @click="this.$store.commit('getPdfByReportId', item.reportId)" v-bind="props">mdi-download</v-icon>```