In the area of "Let us know whether your app contains ads" in App Content, this section tells me that I have to complete the next section
You must let us know whether your app contains ads. The 'Contains ads' label is shown next to apps with ads on Google Play. Make sure this information is accurate, and is kept up to date. here
But when I go to the option, it just show me this
For me, it was the Ad Blocker. I disabled my adblocker and refreshed the page and it worked.
@Mate Farkas's answer (worked on phone) inspired me to test this.
