[URGENT] Is there any other manual way to edit the custom header file?

I have messed up by putting scripting into "custom header" box inside appearance. Now the both site and admin panel is not loading.

Is there any other way, I can edit the header box and remove those scripts.?

I answered in your other topic

Hi there, welcome to Flarum.

Just a friendly reminder that there is no need to create 2 discussions for 1 topic.

I am deleting this now.