Home page not working on SeedDMS

[Dylan Tusler]

So, I spent the last week or so getting PDF previews working, and along the way something seems to have gone awry with the home page of the site. If I try to navigate to the root page, all I get is a blank page saying:
This site can’t be reached
The webpage at http://www.[mydomain].com/ might be temporarily down or it may have moved permanently to a new web address.
ERR_INVALID_RESPONSE

Nothing in console.

This is the message in apache access log:

[Sun Jul 26 23:19:45.015065 2020] [proxy_fcgi:error] [pid 7343:tid 140594529490688] [client x.x.x.x:59576] 
AH01071: Got error 'PHP message: 
PHP Fatal error:  
Uncaught RuntimeException: Unexpected data in output buffer. Maybe you have characters before an opening <?php tag? in /opt/bitnami/apache2/seeddms60x/pear/vendor/slim/slim/Slim/App.php:621
Stack trace:
#0 /opt/bitnami/apache2/seeddms60x/pear/vendor/slim/slim/Slim/App.php
(317): Slim\\App->finalize(Object(Slim\\Http\\Response))
#1 /opt/bitnami/apache2/seeddms60x/seeddms-6.0.10/index.php(78): Slim\\App->run()
#2 {main}
  thrown in /opt/bitnami/apache2/seeddms60x/pear/vendor/slim/slim/
Slim/App.php on line 621'

If I go to a subpage, like http://www.[mydomain].com/out/out.ViewFolder.php?folderid=1 this usually works fine (but not always, sometimes I get rendering issues.)

Here's the contents of the .htaccess file. I added the last line (DirectoryIndex) to try and resolve the issue:

Options -Indexes

RewriteEngine On
RewriteRule ^favicon.ico$ styles/bootstrap/favicon.ico [L]

# Store the current location in an environment variable CWD to use
# mod_rewrite in .htaccess files without knowing the RewriteBase
RewriteCond $0#%{REQUEST_URI} ([^#]*)#(.*)\1$
RewriteRule ^.*$ - [E=CWD:%2]

# Do not allow access on the other directories in www
RewriteRule "^utils/.*$" "" [F]
RewriteRule "^doc/.*$" "" [F]

# Anything below the following dirs will never be rewritten
RewriteRule "^pdfviewer/.*$" "-" [L]
RewriteRule "^views/bootstrap/images.*$" "-" [L]
RewriteRule "^out/images.*$" "-" [L]
RewriteRule "^styles/.*$" "-" [L]

# Accessing a file in an extension is always possible
# Added for old extensions which do not use routes
RewriteCond %{REQUEST_FILENAME} -f
RewriteRule "^ext/.*$" "-" [L]

RewriteCond %{REQUEST_FILENAME} !-f
RewriteCond %{REQUEST_FILENAME} !-d
RewriteCond %{REQUEST_FILENAME} !-l
RewriteRule ^.*$ %{ENV:CWD}index.php [QSA,L]

DirectoryIndex index.php

[Uwe Steinmann]

Have you modified pear/vendor/slim/slim/Slim/App.php ?

[Dylan Tusler]

No, I didn't modify anything in this file at all. However, having said that, I did subsequently modify that file in order to get the site working. I commented out line 317 (the call to Finalize) which fixed my site, but I feel it is hiding the issue rather than fixing it.

[Uwe Steinmann]

Which PHP version are you using?

[Dylan Tusler]

PHP Version 7.3.15

I have a PHPTest page you can see. I will DM you the link, for further information.