Could not import docx even libreoffice already installed in docker

[lindeer]

Describe the bug Enable libreoffice in Dockerfile but still not working

To Reproduce Steps to reproduce the behavior:

1. git clone https://github.com/ether/etherpad-lite.git -b 1.8.18
2. cd etherpad-lite && docker build --build-arg INSTALL_SOFFICE=true .
3. docker tag 91c3fa0e4dcb office
4. mkdir etherdata
5. docker run -it -p 8888:9001 -e 'DB_USER=wesley' -e 'DB_PASS=mypass' -v etherdata:/opt/etherpad-lite/var --name pad office
6. open 'http://0.0.0.0:8888/' in browser and open an editor and upload a local file

Expected behavior Upload selected file and open in editor, but prompt 'upload failed', and console output:

[2022-08-14 06:30:56.571] [INFO] Minify - Compress CSS file css/iframe_editor.css.
[2022-08-14 06:31:16.136] [WARN] ImportHandler - Attempt to import non-ASCII file
[2022-08-14 06:33:11.927] [WARN] ImportHandler - Attempt to import non-ASCII file

Screenshots

Server (please complete the following information):

• Etherpad version: 1.8.18
• OS: Feodra 36(5.18.11-200.fc36.x86_64)