Please check that the module is correctly hooked into the “backOfficeHeader” hook in your back office:

Go to Design > Positions > Search for a hook > BackofficeHeader — then verify that “Fastbay1” is listed among the modules.

If it is not present, click on “Hook a module” in the top right corner, search for “Fastbay1” in the module list,

select “displayBackofficeHeader” in the “Move to” dropdown menu, and click “Hook a module” in the top right corner.