Why is the "target url not working" error in Google Ads when the pages are working?

Question

Search Engine Optimization

The website crashed and some pages didn't work. At this time, the Google bot was making a detour. The site was fixed a long time ago, but Google stubbornly insists that "the target url does not work."

Technical support claims that the problem is on our side and only we can fix it. The urls fell off when there was a failure with the database on the hosting and in Yandex then all the urls stuck together. They said that something could be cached there and the algorithms cannot distinguish that the url works (manually checked, naturally the urls open, because the problem is in the code itself)

I'm sorry, but I don't have any information about this. I provided you with the data that I received, these are broken urls when testing in the ad, as well as the appearance of an HTTPS/DNS error. Please try to check the old archives of the site, test all the pages again, make changes to the ad urls and resave them.

Everything that could be cached has already been deleted several times, the pages have been working for a long time, they open, but Google does not want to scan them. Was it and how to deal with it?

Answer 1

It can be seen that the error 403
Apparently they closed the indexing of these pages for search engines through the rules or the robot