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Is that the exact error message? Is the file in your sources spelled exact LoadAds.php

Easiest way is to upload it to https://www.smfhacks.com/smf-package-parser.html then find similar edits in your theme Or look where it edits the default theme then make the changes in a similar spot in your theme

Admin -> permissions -> modify group

Make sure you modify each membergroup give them the "Enable Ads" permission.

Contact your host and ask to disable mod_security

Replied

Check view source on your page and see if you see the code for adsense at all.

If you do you might have to wait a bit for google to find content for your site.

Check out this article it is an issue with mod_security https://wiki.simplemachines.org/smf/Mod_security_-_Having_problems_with_mod_security

Did you check for double set of code in your files?

The default theme works well. but won't change your category issue i belive.

Hmm ok I guess it does not support that feature. i tried two spots and doesn't seem to work with these theme

Try

try

that querystring file should fix it.

Try this