ERROR 403 - Forbidden!

Hello, VPS Debian 9.
trying to install WordPress but getting ERROR 403 - Forbidden!
in the web error log files I get:
AH01630: client denied by server configuration: /var/www/my.domain/web/index.php
I tried - chown -R www-data:www-data /var/www/clients/client1/web1/web
but it doesn't work for me.
Thank you

 

You are doing the install as wrong user, or maybe SuEXEC is not turned on in website settings.

 

Thank you for the responses.
chown -R web1:client1 /var/www/clients/client1/web1/web does not solve the issue and SuEXEC is enabled in site settings.

 

Are you installing wordpress with the user created for that website?

 

I think I created with root user by mistake but I don't know how to go on from here so if you can sir, In detail how should I do to fix it or maybe refer me to an article about...

 

I install wordpress following the install instructions from wordpress website. I do not know of any more detailed instructions that that.
If you have messed up that website using root user, then remove that website, and create it again with the same name. Or create a new website with a different url address, if that works for you.
Then create a user for that website, either shell user (jailkit) or FTP user, both work so choose what you prefer. Then do the wordpress installation using that user.