This is caused by an incorrect sandbox rule. A related service is referred to as an XPC service, but it should be a global name.
<rdar://77354349>
Created attachment 429104 [details] Patch
Comment on attachment 429104 [details] Patch r=me
Comment on attachment 429104 [details] Patch Thanks for reviewing!
Committed r277779 (237940@main): <https://commits.webkit.org/237940@main> All reviewed patches have been landed. Closing bug and clearing flags on attachment 429104 [details].