I just installed HumHub via webadmin UI on a dedicated domain (root domain).
HumHub should be successfully accessed via browser without "ERR_TOO_MANY_REDIRECTS".
2023/07/24 16:24:45 [crit] 4059201#4059201: *1756111 stat() "/var/www/humhub//index.php" failed (13: Permission denied), client: 127.0.0.1, server: <humhub-url>, request: "GET /index.php?r=installer/index/go HTTP/2.0", host: "<humhub-url>"
2023/07/24 16:24:45 [crit] 4059201#4059201: *1756113 stat() "/var/www/humhub//index.php" failed (13: Permission denied), client: 127.0.0.1, server: <humhub-url>, request: "GET /index.php?r=installer%2Fsetup%2Ffinalize HTTP/2.0", host: "<humhub-url>"
2023/07/24 16:24:45 [crit] 4059201#4059201: *1756113 stat() "/var/www/humhub//index.php" failed (13: Permission denied), client: 127.0.0.1, server: <humhub-url>, request: "GET /index.php?r=installer%2Fconfig HTTP/2.0", host: "<humhub-url>"
2023/07/24 16:24:46 [crit] 4059201#4059201: *1756113 stat() "/var/www/humhub//index.php" failed (13: Permission denied), client: 127.0.0.1, server: <humhub-url>, request: "GET /index.php?r=installer%2Fconfig%2Fbasic HTTP/2.0", host: "<humhub-url>"
2023/07/24 16:24:51 [crit] 4059201#4059201: *1756120 stat() "/var/www/humhub//index.php" failed (13: Permission denied), client: 127.0.0.1, server: <humhub-url>, request: "GET /index.php?r=installer/config/basic HTTP/2.0", host: "<humhub-url>"
2023/07/24 16:24:52 [crit] 4059201#4059201: *1756122 stat() "/var/www/humhub//index.php" failed (13: Permission denied), client: 127.0.0.1, server: <humhub-url>, request: "POST /index.php?r=installer/config/basic HTTP/2.0", host: "<humhub-url>"
2023/07/24 16:24:54 [crit] 4059201#4059201: *1756124 stat() "/var/www/humhub//index.php" failed (13: Permission denied), client: 127.0.0.1, server:<humhub-url>, request: "GET /index.php?r=installer/config/use-case HTTP/2.0", host: "<humhub-url>"
2023/07/24 16:24:54 [crit] 4059201#4059201: *1756126 stat() "/var/www/humhub//index.php" failed (13: Permission denied), client: 127.0.0.1, server: <humhub-url>, request: "POST /index.php?r=installer/config/use-case HTTP/2.0", host: "<humhub-url>"
2023/07/24 16:24:56 [crit] 4059201#4059201: *1756129 stat() "/var/www/humhub//index.php" failed (13: Permission denied), client: 127.0.0.1, server: <humhub-url>, request: "GET /index.php?r=installer/config/sample-data HTTP/2.0", host: "<humhub-url>"
2023/07/24 16:24:56 [crit] 4059201#4059201: *1756131 stat() "/var/www/humhub//index.php" failed (13: Permission denied), client: 127.0.0.1, server: <humhub-url>, request: "POST /index.php?r=installer/config/sample-data HTTP/2.0", host: "<humhub-url>"