I solved the problem but I don't know exactly how. I was able to go through and finish the course and then the error disappeared altogether. Alone.

Yes, now it works. Thanks!

Could be an error generated by wrong images? Compile asset catalogs: CoreData: error: API Misuse: Attempt to serialize store access on non-owning coordinator (PSC = 0x600003e8df80, store PSC = 0x0) CoreData: error: API Misuse: Attempt to serialize store access on non-owning coordinator (PSC = 0x600003e8df80, store PSC = 0x0) 2023-03-19 18:56:05.213 AssetCatalogSimulatorAgent[97431:1814739] *** Assertion failure in -[CoreThemeDocument metadatumForKey:], CoreThemeDocument.m:8209 CoreData: error: API Misuse: Attempt to serialize store access on non-owning coordinator (PSC = 0x600003e8df80, store PSC = 0x0) CoreData: error: API Misuse: Attempt to serialize store access on non-owning coordinator (PSC = 0x600003e8df80, store PSC = 0x0) CoreData: error: API Misuse: Attempt to serialize store access on non-owning coordinator (PSC = 0x600003e8df80, store PSC = 0x0) Assertion failed: (result && key), function CUIRenditionKeyCopy, file CUIThemeRendition_Support.m, line 871. 2023-03-19 18:56:06.280 ibtoold[97426:1814598] *** Terminating app due to uncaught exception 'IBPlatformToolFailureException', reason: 'The tool closed the connection (AssetCatalogSimulatorAgent) Thank you all for the help

Thanks for your answer. Now I'm coding and I'm looking for a solution to adapt old app in the course to Xcode 14. For training. 😀