Hi, have this Apache2 configuration:

<VirtualHost *:80>
    ServerName <DOMAIN>

    ErrorLog ${APACHE_LOG_DIR}/error.log
    CustomLog ${APACHE_LOG_DIR}/access.log combined

    RewriteEngine on
    RewriteRule ^ https://%{HTTP_HOST}%{REQUEST_URI} [R=301,L]
</VirtualHost>

<VirtualHost *:443>
    ServerName <DOMAIN>

    ErrorLog ${APACHE_LOG_DIR}/error.log
    CustomLog ${APACHE_LOG_DIR}/access.log combined

    SSLEngine On
    SSLCertificateFile    /etc/letsencrypt/live/<DOMAIN>/cert.pem
    SSLCertificateKeyFile /etc/letsencrypt/live/<DOMAIN>/privkey.pem
    SSLCertificateChainFile /etc/letsencrypt/live/<DOMAIN>/fullchain.pem

    ProxyPreserveHost On

    ProxyPass / http://127.0.0.1:8080/
    ProxyPassReverse / http://127.0.0.1:8080/
    RewriteCond %{HTTP:Upgrade} =websocket
    RewriteRule /(.*) ws://127.0.0.1:8080/$1 [P,L]
    RewriteCond %{HTTP:Upgrade} !=websocket
    RewriteRule /(.*) wss://127.0.0.1:8080/$1 [P,L]
    RewriteCond %{HTTP:Upgrade} !=websocket
    RewriteRule /(.*) http://127.0.0.1:8080/$1 [P,L]
</VirtualHost>

Only then, whenever I want to log in, this comes up:

[Error 422] The cross-site request forgery token could not be verified. If you tried to save data on multiple tabs or browsers, close them and reload this page to repeat the process.

And yes, I have only one tab open