Why am I suddenly getting "Invalid regular expression: invalid group specifier name Stack Trace"

The app refuses to work suddenly and I’m seeing this error on the screen

Invalid regular expression: invalid group specifier nameStack Trace

RegExp@[native code] TY@tauri://localhost/assets/reveal-fc9DhCTQ.js:50:10790 i@tauri://localhost/assets/reveal-fc9DhCTQ.js:67:3824 Q5@tauri://localhost/assets/reveal-fc9DhCTQ.js:77:13485 ep@tauri://localhost/assets/index-AB9RkwWo.js:25:17373 ok@tauri://localhost/assets/index-AB9RkwWo.js:27:44292 ek@tauri://localhost/assets/index-AB9RkwWo.js:27:39989 F6@tauri://localhost/assets/index-AB9RkwWo.js:27:39917 zu@tauri://localhost/assets/index-AB9RkwWo.js:27:39770 Ep@tauri://localhost/assets/index-AB9RkwWo.js:27:36098 X2@tauri://localhost/assets/index-AB9RkwWo.js:27:35049 X2@[native code] $@tauri://localhost/assets/index-AB9RkwWo.js:20:8900 B@tauri://localhost/assets/index-AB9RkwWo.js:20:9274