# 🐛 BUG: Unable to run wrangler dev since version 3.19.0
## What happened
Issue cloudflare/workers-sdk#4921 (closed, 35 comments): ### Which Cloudflare product(s) does this pertain to? Wrangler core ### What version(s) of the tool(s) are you using? 3.26.0 ### What version of Node are you using? 20.11.0 ### What operating system and version are you using? macOS Sonoma 14.3 ### Describe the Bug ### Observed behavior Since version 3.19.0 of wrangler was released we're no longer able to run `wrangler dev --remote`. It runs, but as soon as a page is viewed the following error is thrown: ``` ✘ [ERROR] Error in ProxyController: Error inside ProxyWorker { name: 'Error', message:...
## What works
[petebacondarwin (contributor)]: Underscores in worker names break TLS hostname verification (test_worker.subdomain.workers.dev fails the check), which breaks wrangler dev --remote and Miniflare fetches. Rename the worker to remove the underscore: do it in the Cloudflare dashboard (Workers -> Manage -> Rename Worker), not by renaming in wrangler.toml, which would orphan the old worker. zehawki confirmed the dashboard rename fixed it with no data loss.
## Caveats
This comes from one real issue thread (gh:cloudflare/workers-sdk#4921); it is the verified fix or approach from that thread, not a general manual. Check your version of Cloudflare Workers AI first , maintainers often fix the underlying bug in a later release, and the thread may predate it.