# Curly apostrophe error

**URL:** <https://forums.plex.tv/t/curly-apostrophe-error/944915>\
**Category:** Plex Media Server\
**Tags:** server-mac\
**Created:** [October 21, 2026, 4:45pm UTC](https://forums.plex.tv/t/curly-apostrophe-error/944915 "2026-10-21T16:45:34Z")\
**Posts on this page:** 2\
**Page:** 1

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**Author:** ![sethjk17](https://avatars.discourse-cdn.com/v4/letter/s/77aa72/32.png) [@sethjk17](https://forums.plex.tv/u/sethjk17)\
**Post date:** [October 21, 2026, 4:45pm UTC](https://forums.plex.tv/t/curly-apostrophe-error/944915/1 "2026-10-21T16:45:34Z")

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**PMS 1.43.4.10903 (macOS, arm64): server Friendly Name with curly apostrophe rejected as invalid header**

Server name was the macOS default style, “Seth’s Mac Mini Server” (U+2019 apostrophe). [PMS logs](https://support.plex.tv/articles/200250417-plex-media-server-log-files/) repeatedly:  
ERROR - [MediaProviderManager/Response::fetch] [HttpHeader] invalid ‘X-Plex-Device-Name’ header value (Seth’s Mac Mini Server)  
Renaming the server to “Seths Mac Mini Server” stopped the errors. Since macOS default computer names use U+2019, this likely affects many Mac servers. Non-ASCII friendly names should be encoded rather than rejected.

I only experienced this issue on the web. Mobile app was fine

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**Author:** ![napolij](https://avatars.discourse-cdn.com/v4/letter/n/a4c791/32.png) [@napolij](https://forums.plex.tv/u/napolij)\
**Post date:** [October 21, 2026, 5:26pm UTC](https://forums.plex.tv/t/curly-apostrophe-error/944915/2 "2026-10-21T17:26:10Z")

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From the web: Plex follows standard RFC 1123 hostname rules. A valid Plex hostname or custom server address can use **letters (a–z, A–Z)**, **numbers (0–9)**, and **hyphens (-)**. It cannot contain spaces, underscores, or special symbols, and labels cannot start or end with a hyphe