File upload crashed site

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Yesterday we attempted to upload an image file to our site which somehow resulted in the site returning a 500 error for every page except our page not found page. After a bit of troubleshooting we deleted the image file using FTP and the site started loading again. After this we are still experiencing an issue where attempting to upload images in some cases results in an error of session_start(): Failed to decode session object. Session has been destroyed
I have attached the image file to aid in duplication of this issue.

1 Attachment


Status: New

concrete5 Environment Information

# concrete5 Version
Core Version - 8.3.2
Version Installed - 8.3.2
Database Version - 20180122213656

# concrete5 Packages
Fruitful (1.2), Simple Gallery (1.0.7)

# concrete5 Overrides
blocks/audio/icon.png, blocks/audio/controller.php, blocks/audio/add.php, blocks/audio/edit.php, blocks/audio/form.php, blocks/audio/db.xml, blocks/audio/view.php, blocks/audio/mediaelement/lang/ca.js, blocks/audio/mediaelement/lang/cs.js, blocks/audio/mediaelement/lang/de.js, blocks/audio/mediaelement/lang/es.js, blocks/audio/mediaelement/lang/fa.js, blocks/audio/mediaelement/lang/fr.js, blocks/audio/mediaelement/lang/hr.js, blocks/audio/mediaelement/lang/hu.js, blocks/audio/mediaelement/lang/it.js, blocks/audio/mediaelement/lang/ja.js, blocks/audio/mediaelement/lang/ko.js, blocks/audio/mediaelement/lang/nl.js, blocks/audio/mediaelement/lang/pl.js, blocks/audio/mediaelement/lang/pt.js, blocks/audio/mediaelement/lang/ro.js, blocks/audio/mediaelement/lang/ru.js, blocks/audio/mediaelement/lang/sk.js, blocks/audio/mediaelement/lang/sv.js, blocks/audio/mediaelement/lang/uk.js, blocks/audio/mediaelement/lang/zh-cn.js, blocks/audio/mediaelement/lang/zh.js, blocks/audio/mediaelement/lang, blocks/audio/mediaelement/renderers/dailymotion.js, blocks/audio/mediaelement/renderers/dailymotion.min.js, blocks/audio/mediaelement/renderers/facebook.js, blocks/audio/mediaelement/renderers/facebook.min.js, blocks/audio/mediaelement/renderers/soundcloud.js, blocks/audio/mediaelement/renderers/soundcloud.min.js, blocks/audio/mediaelement/renderers/twitch.js, blocks/audio/mediaelement/renderers/twitch.min.js, blocks/audio/mediaelement/renderers/vimeo.js, blocks/audio/mediaelement/renderers/vimeo.min.js, blocks/audio/mediaelement/renderers, blocks/audio/mediaelement/mediaelement.js, blocks/audio/mediaelement/mediaelement.min.js, blocks/audio/mediaelement/mediaelement-and-player.js, blocks/audio/mediaelement/mediaelement-and-player.min.js, blocks/audio/mediaelement/mediaelement-flash-audio.swf, blocks/audio/mediaelement/mediaelement-flash-audio-ogg.swf, blocks/audio/mediaelement/mediaelement-flash-video.swf, blocks/audio/mediaelement/mediaelement-flash-video-hls.swf, blocks/audio/mediaelement/mediaelement-flash-video-mdash.swf, blocks/audio/mediaelement/mediaelementplayer.css, blocks/audio/mediaelement/mediaelementplayer.min.css, blocks/audio/mediaelement/mediaelementplayer-legacy.css, blocks/audio/mediaelement/mediaelementplayer-legacy.min.css, blocks/audio/mediaelement/mejs-controls.png, blocks/audio/mediaelement/mejs-controls.svg, blocks/audio/mediaelement, blocks/audio/view.js, blocks/audio

# concrete5 Cache Settings
Block Cache - Off
Overrides Cache - Off
Full Page Caching - Off
Full Page Cache Lifetime - Every 6 hours (default setting).

# Server Software
Apache

# Server API
cgi-fcgi

# PHP Version
7.2.3

# PHP Extensions
bcmath, bz2, calendar, cgi-fcgi, Core, ctype, curl, date, dba, dom, exif, fileinfo, filter, ftp, gd, gettext, hash, iconv, imap, intl, json, libxml, mbstring, mysqli, mysqlnd, openssl, pcre, PDO, pdo_mysql, pdo_sqlite, Phar, posix, Reflection, session, shmop, SimpleXML, soap, sodium, SPL, sqlite3, standard, tidy, tokenizer, wddx, xml, xmlreader, xmlwriter, xsl, zip, zlib

# PHP Settings
max_execution_time - 50000
log_errors_max_len - 1024
max_file_uploads - 20
max_input_nesting_level - 64
max_input_time - -1
max_input_vars - 5000
memory_limit - 256M
post_max_size - 64M
upload_max_filesize - 64M
mysqli.max_links - Unlimited
mysqli.max_persistent - Unlimited
pcre.backtrack_limit - 1000000
pcre.recursion_limit - 100000
session.cache_limiter - <i>no value</i>
session.gc_maxlifetime - 7200
soap.wsdl_cache_limit - 5

Browser User-Agent String

Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/65.0.3325.181 Safari/537.36