Fail to upload cover image OJS 3.3.0.8

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The apache conf settings described in for example: [OJS 3.2.0.3] Error on Submission Page - #24 by KBodarwe solved my issue.

Edit: Our system is now updated to 3.3.0-13

This is my conf file for journal4 (within the directory tag) The main site is loacated at journal-mainsite.com and has a multiple of journals both with their own domains and without own domains:

    AllowOverride None
    Options Indexes FollowSymLinks MultiViews
    Require all granted
    DirectoryIndex index.php

    RewriteEngine on
    RewriteBase /

    RewriteCond %{HTTP_HOST} ^www\.(.*)$ [NC]
    RewriteRule ^(.*)$ https://%1/$1 [R=301,L]

  RewriteCond %{REQUEST_URI} /index.php/journal1 [NC]
  RewriteRule ^(.*)$ https://jourlnal1.com/$1  [R=301,L]
  RewriteCond %{REQUEST_URI} /index.php/journal2 [NC]
  RewriteRule ^(.*)$ https://journal2.com/$1  [R=301,L]
  RewriteCond %{REQUEST_URI} /index.php/journal3-without-own-domain [NC]
  RewriteRule ^(.*)$ https://journal-mainsite.com/$1  [R=301,L]

    RewriteCond %{REQUEST_URI} /index.php$
    RewriteRule ^(.*)$ index.php/journal4 [QSA,L]

# Bugfix for OJS 3.2.0-3: submissions API doesnt work with shortened URLs
RewriteRule ^api/v1(.*)$ index.php/journal4/api/v1$1 [L,R=307]

# Rewrite URL to look cleaner
RewriteCond %{SERVER_NAME} ^journal4.com
RewriteCond %{REQUEST_URI} !/journal4/
RewriteCond %{REQUEST_FILENAME} !-f
RewriteRule ^(.*)$ index.php/journal4/$1 [L]