You need to install something on the local host. See the timimi documentation. Its trivial and works forever fore file:// based wikis.
There are plenty of choices so dont give up.
- In there a SharePoint environment there?
- Is the data in the wiki confidential?
- There is a PWA implementation I have not yet used
- TiddlyStore is another approach
- Are you precluded from hosting a node install on a server?