Built-in offline circulation interface gives the following error message: Offline circulation disabled Your browser is not compatible with the built-in offline circulation tool. I tried this on Chrome (Version 114.0.5735.199 and Version 115.0.5790.102), Edge (Version 114.0.1823.82) and Firefox (115.0.2). Koha 21.05 is not giving that error message.
Offline circ has been removed because of browser compatibility issues. See Bug 33961.