If the Fluidd interface displays incorrectly or incompletely after a firmware update (as shown below), reinstalling the Fluidd files may resolve the issue.
Error example 1

Error example 2

Connect to the printer using its IP address.
Log in with the following credentials:
Username: mks
Password: makerbase


Right-click the fluidd folder and delete it.

Drag the downloaded fluidd folder into the directory and wait for the transfer to complete.

Open the Fluidd page in your browser.
If it loads correctly, the issue has been resolved.

If the problem persists:
In the SSH terminal, navigate to:
/home/mks/printer_data/database/
Delete the file:
moonraker-sql.db
Restart the printer.