File suddenly stopped working

Hello! All of a sudden my ELAN files stopped working. All I see is a blue screen and clicking the controls does nothing.

Here is the log:

Jun 28, 2019 9:49:22 AM mpi.eudico.client.annotator.ELAN main
INFO:

@ELAN Launched

Jun 28, 2019 9:49:23 AM mpi.eudico.client.annotator.ELAN main
INFO: ELAN 5.7-FX
Java home: C:\Users\user\AppData\Local\Programs\ELAN_5-7-FX\runtime
Java version: 11.0.1
Runtime: 11.0.1+13
OS name: Windows 7
OS version: 6.1
OS arch.: amd64
User language: en
User home: C:\Users\user
User dir: C:\Users\user\AppData\Local\Programs\ELAN_5-7-FX\app
Classpath: C:\Users\user\AppData\Local\Programs\ELAN_5-7-FX\app\elan-5.7.jar;activation-1.1.1.jar;annot-search-lib-1.4.11.jar;annot-tools-1.1.12.jar;annotation-schema-1.0.jar;bridj-0.7.0.jar;commons-codec-1.9.jar;commons-io-2.5.jar;commons-logging-1.2.jar;dx-1.7.jar;elan-5.5.jar;guk-0.7.jar;hsqldb-1.8.0.10.jar;httpclient-4.4.1.jar;httpcore-4.4.1.jar;hunspell-bridj-1.0.4.jar;javafx-base-11-win.jar;javafx-base-11.jar;javafx-controls-11-win.jar;javafx-controls-11.jar;javafx-graphics-11-win.jar;javafx-graphics-11.jar;javafx-media-11-win.jar;javafx-media-11.jar;javafx-swing-11-win.jar;javafx-swing-11.jar;jhall-2.0.0.5.jar;help.zip;javax.activation-api-1.2.0.jar;jaxb-api-2.3.1.jar;jaxb-core.jar;jaxb-impl.jar;jlfgr-1.0.jar;jna-3.5.2.jar;json-20160212.jar;lexan-api-0.9.jar;lexiconcomponent-1.6.jar;log4j-1.2.17.jar;metadata-api-1.5.0.jar;mfsearch-1.5.7.jar;platform-3.5.2.jar;slf4j-api-1.7.5.jar;staccato-1.0.0.jar;vlcj-2.4.1.jar;xalan-2.4.1.jar;xercesImpl-2.11.0.jar;xml-apis-1.4.01.jar;xml-resolver-1.2.jar;xmlbeans-2.6.0.jar;im\nl.mpi.gim__V04.jar;im\nl.mpi.lookup.CJKV__V03.jar;im\nl.mpi.lookup.IPA__V04.jar;im\nl.mpi.lookup__V1.0.jar
Library path: nativelib
Display info:
Screen 1 - isDefault:true, w:1366, h:768, bitDepth:32
Main screen resolution:96 (w:1366, h:768)

Jun 28, 2019 9:49:24 AM mpi.eudico.client.annotator.prefs.PreferencesReader parse
INFO: Reading preferences: C:\Users\user.elan_data\elan.pfsx
External updater thread started
Jun 28, 2019 9:49:24 AM mpi.eudico.client.annotator.DesktopAppHandler setHandlers
INFO: The APP_ABOUT action is not supported on the current platform!
Jun 28, 2019 9:49:24 AM mpi.eudico.client.annotator.DesktopAppHandler setHandlers
INFO: The APP_QUIT_HANDLER action is not supported on the current platform!
Jun 28, 2019 9:49:24 AM mpi.eudico.client.annotator.DesktopAppHandler setHandlers
INFO: The APP_OPEN_FILE action is not supported on the current platform!
Jun 28, 2019 9:49:24 AM mpi.eudico.client.annotator.DesktopAppHandler setHandlers
INFO: The APP_PREFERENCES action is not supported on the current platform!
Jun 28, 2019 9:49:25 AM mpi.eudico.client.annotator.prefs.PreferencesReader parse
INFO: Preferences file does not exist: C:\Users\user.elan_data\shortcuts.pfsx
Jun 28, 2019 9:49:25 AM mpi.eudico.client.annotator.commands.ShortcutsUtil readCurrentShortcuts
INFO: Could not load the keyboard shortcut preferences file. The file does not exist or is not valid.
Jun 28, 2019 9:49:27 AM mpi.eudico.client.annotator.prefs.PreferencesReader parse
INFO: Reading preferences: C:\Users\user\Documents\pisl\030219_DN_A_250619.pfsx
Jun 28, 2019 9:49:30 AM mpi.eudico.client.annotator.ElanFrame2 checkMedia
INFO: Updated file location from: “///Users/rehanaomardeen/ownCloud/PISL Working Folder/Lexical Elicitation/030219 DN/Animals/Processed/030219_DN_A.mp4” to: “C:\Users\user\Documents\pisl\030219_DN_A.mp4”, in same directory as transcription file
Using JMMF Player for file:///C:/Users/user/Documents/pisl/030219_DN_A.mp4
Jun 28, 2019 9:49:31 AM mpi.eudico.client.annotator.player.JMMFMediaPlayer getAspectRatio
WARNING: The aspect ratio is not initialized yet
Jun 28, 2019 9:49:31 AM mpi.eudico.client.annotator.commands.ClipMediaCA <init>
INFO: No clipping script found!
Jun 28, 2019 9:49:32 AM mpi.eudico.client.annotator.tiersets.TierSetUtil readTierSetsFromFile
INFO: Could not load the tier set file. The file does not exist or is not valid.
Jun 28, 2019 9:49:33 AM mpi.eudico.client.annotator.util.AvailabilityDetector detectFromJar
WARNING: No plug-in cmdi metadata file found in analyzer-gloss-0.5.jar
Jun 28, 2019 9:49:33 AM mpi.eudico.client.annotator.util.AvailabilityDetector detectFromJar
WARNING: No plug-in cmdi metadata file found in annotyzer-lexicon-0.5-compound.jar
Jun 28, 2019 9:49:33 AM mpi.eudico.client.annotator.util.AvailabilityDetector detectFromJar
WARNING: No plug-in cmdi metadata file found in annotyzer-whitespace-split-0.7.jar
Jun 28, 2019 9:49:34 AM mpi.eudico.client.annotator.player.JMMFMediaPlayer getAspectRatio
WARNING: The aspect ratio is not initialized yet
Jun 28, 2019 9:49:34 AM mpi.eudico.client.annotator.player.JMMFMediaPlayer getSourceWidth
WARNING: Width not initialized yet
Jun 28, 2019 9:49:34 AM mpi.eudico.client.annotator.player.JMMFMediaPlayer getAspectRatio
WARNING: The aspect ratio is not initialized yet
Jun 28, 2019 9:49:34 AM mpi.eudico.client.annotator.player.JMMFMediaPlayer getSourceWidth
WARNING: Width not initialized yet
Jun 28, 2019 9:49:34 AM mpi.eudico.client.annotator.prefs.PreferencesWriter encodeAndSave
INFO: Writing preferences: C:\Users\user.elan_data\elan.pfsx
Jun 28, 2019 9:49:34 AM mpi.eudico.client.annotator.player.JMMFMediaPlayer getAspectRatio
WARNING: The aspect ratio is not initialized yet
Jun 28, 2019 9:49:34 AM mpi.eudico.client.annotator.player.JMMFMediaPlayer getSourceWidth
WARNING: Width not initialized yet
Jun 28, 2019 9:49:35 AM mpi.eudico.client.annotator.player.JMMFMediaPlayer getAspectRatio
WARNING: The aspect ratio is not initialized yet
Jun 28, 2019 9:49:35 AM mpi.eudico.client.annotator.player.JMMFMediaPlayer getSourceWidth
WARNING: Width not initialized yet

Thank you for your help!

From the log messages it seems some video properties never get initialized. It is unclear why. You mention that this happened all of the sudden; does this mean that it cannot be linked to an update of the system or video driver or the like? Is this PC being rebooted regularly (and if not, does a reboot fix the problem)?

-Han