Question Google bot

The hope was that by switching to "Pretty URLs," the website would be found and indexed by Google Search. Unfortunately, that hope did not come true. As a result, this problem still persists. The HTTP Status is still 406 for the Google Bot

That is a bit strange. This response comes from the BadBot checker in webtrees, which should allow GoogleBot.

Yesterday I have submitted my sitemap again (had not done that in years) and some hours later the Search Console reported me it was crawling happily.

Just checking: you are running a recent version (I recall but cannot check at this moment: v2.2.6) of webtrees without any external / 3rd party modules and no modifications or patches?

Yes, I'm running the newest version v2.2.6 - fresh downloaded an fresh installed without any 3rd part module.

Is it possible to generally disable the Bad Bot Blocker - just for testing?

@BertKoor
I have removed all lines with "Google" in the BadBotBlocker.php
Than I have checked the Page in Google Search Console again. now I was able to request the indexing.

I assume I dont need to delete ALL Google lines in the BadBotBocker.php....

Removing all that is generally not a good idea. That will result in that any bot claiming to be google will be served, even when it is just pretending or using a user agent string vaguely resembling the user agent used by GoogleBot.

I think it should suffice to remove the 'google' line within the array ROBOT_REV_FWD_DNS (line 1480)

Can you go to the webtrees Control Panel - click link Server Information - find "disable_functions".
If the value of that contains either 'gethostbyaddr' or 'gethostbyname' then that could explain why google is not recognised. Although I'm not sure... if those functions were disabled then I expect a concrete error about that.

Only  removing the 'google' line within the array ROBOT_REV_FWD_DNS (line 1480) doesn't help - errorFehler: Wegen eines anderen 4xx-Problems blockiert

In the fiels "disable_functions" is 'no value'

Sorry, I'm out of ideas to debug and trouble-shoot this.
I guess something on your server is not acting as expected, but what...

@bertkoor
I have diskussed it withe the support of my hosting provider - they pointet me to the BadBotBlocker.php based on their logfiles.
After deleting all Google bots from BadBotBlocker.php the issue seems to be resolved. Now I have to wait vor Google to index my page and display it in Google Search

Bonjour.
Je suis intéressé par ce sujet, obtenant les mêmes erreurs.
La commande

curl -A "Googlebot" -I lesbarbry.fr/tree/lesbarbry.ged/individu...-Anne-Josephe-BARBRY

me renvoye toujours HTTP/2 406. Je n'ai pas ce problème avec Slurp ou Bingbot , mais je l'ai avec DuckDuckBot .
J'ai essayé sans succès d'ajouter 

RewriteCond %{HTTP_USER_AGENT} ^(Googlebot|Bingbot|Slurp|DuckDuckBot|Baiduspider|YandexBot|facebot|ia_archiver|Twitterbot|Pinterest) [NC]

dans mon fichier .htaccess ainsi que supprimer toutes les lignes Google dans  BadBotBlocker.php
Je ne trouve pas de solution.
 

You spoofed a fake request by google. webtrees checks whether the ip address really belongs to google.
github.com/fisharebest/webtrees/blob/23b...BotBlocker.php#L1480
github.com/fisharebest/webtrees/blob/23b...BotBlocker.php#L1647

I bet you did not do the request from a server in a google datacentre, so these requests get blocked.

May I ask why you went investigating this? Are you having specific errors with google?