Can't create encrypted bin with only client side encryption

[ekamil]

Describe the bug Can't create encrypted bin with only client side encryption

To Reproduce

1. go to the bin page
2. add content
3. add password
4. (optional) change the Privacy
5. try to click "save"

Changing Privacy type doesn't change the outcome. Unencrypted bins work.

Expected behavior A new bin is created

Screenshots

Desktop (please complete the following information):

• OS: macOS
• Browser firefox
• Version 116.0

Deployment using docker via ansible with the following env vars:

MICROBIN_EDITABLE: "true"
MICROBIN_NO_LISTING: "true"
MICROBIN_PRIVATE: "true"
MICROBIN_DATA_DIR: "microbin_data"
MICROBIN_PUBLIC_PATH: "https://{{ microbin_subdomain }}"
MICROBIN_READONLY: "false"
MICROBIN_SHOW_READ_STATS: "true"
MICROBIN_GC_DAYS: "45"
MICROBIN_ENABLE_BURN_AFTER: "true"
MICROBIN_DEFAULT_BURN_AFTER: "0"
MICROBIN_QR: "false"
MICROBIN_ENABLE_READONLY: "false"
MICROBIN_DEFAULT_EXPIRY: "24hour"
MICROBIN_NO_FILE_UPLOAD: "false"
MICROBIN_ENCRYPTION_CLIENT_SIDE: "true"
MICROBIN_ENCRYPTION_SERVER_SIDE: "false"
MICROBIN_MAX_FILE_SIZE_ENCRYPTED_MB: "10"
MICROBIN_MAX_FILE_SIZE_UNENCRYPTED_MB: "5"
MICROBIN_DISABLE_TELEMETRY: "true"
MICROBIN_LIST_SERVER: "false"