Cannot install letsencrypt, 404

Help
11

The first one
" ProxyPass ajp://localhost:9090/
ProxyPassReverse ajp://localhost:9090/ " gave me syntax ok, but failed on:
root@ip-72-167-40-139:/etc/apache2/sites-available# sudo certbot --apache
Saving debug log to /var/log/letsencrypt/letsencrypt.log
Plugins selected: Authenticator apache, Installer apache

Which names would you like to activate HTTPS for?

1: arqls.com.br
2: www.arqls.com.br

Select the appropriate numbers separated by commas and/or spaces, or leave input
blank to select all options shown (Enter 'c' to cancel):
Obtaining a new certificate
Performing the following challenges:
http-01 challenge for arqls.com.br
http-01 challenge for www.arqls.com.br
Enabled Apache rewrite module
Waiting for verification...
Challenge failed for domain arqls.com.br
Challenge failed for domain www.arqls.com.br
http-01 challenge for arqls.com.br
http-01 challenge for www.arqls.com.br
Cleaning up challenges
Some challenges have failed.

IMPORTANT NOTES:

The second one gave me this error:

root@ip-72-167-40-139:/etc/apache2/sites-available# sudo apachectl configtest

AH00526: Syntax error on line 12 of /etc/apache2/sites-enabled/000-default.conf:

ProxyPass|ProxyPassMatch can not have a path when defined in a location.

Action 'configtest' failed.

The Apache error log may have more information.