What the .... am I missing ?! Everything is like it suppouse to be. I have 3 clients websites with the same settings and other 2 are working with no issues....
robots.txt - check and I am not blocking anything except admin, but you can check, its a standart robots txt for osclass
index tags on pages - check
uruls active - check, checked also for those errors with online checkers, no problem found, etc.

But Google Search has other mind:
1. Pages with "Redirect error" - 990 - Same pages do NOT have redirects or whathe f-ing ever, they are also not with changed urls or else.
2. The page is found - not currently indexed - 840 - ANd WHY IT IS NOT Indexed ?! Just bunch a urls not cheched... Its like that from the last year same time ( july )... I changed and moved my website to an new url and ...here we go again....

For 1. - When i do URL check:
The URL is not available to Google
It cannot be indexed. Find out more
Page changed?

Availability
Redirect error
The URL will only be indexed if certain conditions are met
Detection
Not checked in active version tests
Crawling
Time
14.07.2020, 2:00:54
Crawler
Googlebot for desktops
Is crawling allowed?
Yes
Retrieve the page

Failed: Redirect error

And again the URL is there and it does not contain or it is not an redirection.

For 2. - The same damn error
The URL is not available to Google
It cannot be indexed. Find out more
Page changed?

Availability
Redirect error
The URL will only be indexed if certain conditions are met
Detection
Not checked in active version tests
Crawling
Time
14.07.2020, 2:04:39
Crawler
Googlebot for desktops
Is crawling allowed?
Yes
Retrieve the page

Failed: Redirect error
Is indexing allowed?
No value


All those links are the ads published in my website. I am using osclass. Changed numerous damn plugins for SEO, robots txt checked and still no resolved issie... Whet the F is the damn problem then ?!
No one tells. From the devs checked -- All fine.. Other checkers online and proffessionals sayd that the website is fine..... Where is the problem ?! It does not containt any illegal things or whatever, just an classifieds website. It will come to an second year of problems......

@pipetko
Maybe content on different urls is very similar and you do not have canonical URL set.

Nope... I do not have ads that are the same ( or atleast with the same urls ), there is Cannonical url tag, check the external code of the website you will see canonical tags,

Then your site is consideted as low important and may have no backlinks.

Well that will be weird... All this happened when I installed SEO extension. First i tried yours, then few others, result all the same problems. Every problem started when i started using seo extensions, not before that. The website was running at top positions, all ads indexed. After using SEO extensions little by little all ads started dissapearing from index.....

@pipetko
After changing meta tags on site, it's usual site will drop for some time and then get back to original place (+- depending on new tags). If you change it regularly, it will not be helpful

Well. I havent changed anything. After added all meta data the first time I used seo plugin, after changing the plugins I used same data, so basically nothing changed... year later, no result, just gets worse.