wrong address showing in google adsense

Hi there,
I put google adsense in my website.

I saw “Crawler errors” then I click Fix crawler errors and it shows Robot Denied for this address: https://directorysingapore.com.sg/directorysg/wp-admin/admin.php?page=2

When I click on that address, it will totally shut down my browser causing my browser hang. Then I login to my dashboard again to open this page. Actually there is not such page. The right address is supposed to be: https://directorysingapore.com.sg/directorysg/wp-admin/admin.php?page=1

I dun understand why there is a “2” showing in my “Crawler errors” dashboard at google adsense.

Any idea why is it?

Thanks!