Just updated to RStudio 2026.07.0-139, and got a "Error Starting R" screen.
Downgraded to 2026.06.0-242 and still got the same error, then downgraded to 2026.05.2-229 and at last RStudio launched properly. It seems to be related to folder permissions, but this wasn't an issue before. Also the message mentions something about Claude, so I tried commenting out my ~/.Rprofile, but error persisted.
Error report added below:
R Session Startup Failure Report
RStudio Version
RStudio 2026.07.0+139 "Pacific Dogwood " (5c876ced, 2026-07-09) for macOS
Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) RStudio/2026.07.0+139 Chrome/146.0.7680.216 Electron/41.9.0 Safari/537.36
Error message
The R session had a fatal error.
2026-07-10T14:46:48.132963Z [rsession-bolea] ERROR system error 13 (Permission denied) [path: /Users/bolea/.local/share/rstudio/monitored/lists/6f07-a971-bed1-6b42, target-path: /Users/bolea/.local/share/rstudio/monitored/lists/project_name_mru]; OCCURRED AT Error rstudio::core::FilePath::move(const FilePath &, MoveType, bool) const src/cpp/shared_core/FilePath.cpp:1578
2026-07-10T14:46:48.132963Z [rsession-bolea] ERROR system error 13 (Permission denied) [path: /Users/bolea/.local/share/rstudio/monitored/lists/6f07-a971-bed1-6b42, target-path: /Users/bolea/.local/share/rstudio/monitored/lists/project_name_mru]; OCCURRED AT Error rstudio::core::FilePath::move(const FilePath &, MoveType, bool) const src/cpp/shared_core/FilePath.cpp:1578
Process Output
The R session exited with code 2.
Error output:
2026-07-10T14:46:48.132963Z [rsession-bolea] ERROR system error 13 (Permission denied) [path: /Users/bolea/.local/share/rstudio/monitored/lists/6f07-a971-bed1-6b42, target-path: /Users/bolea/.local/share/rstudio/monitored/lists/project_name_mru]; OCCURRED AT Error rstudio::core::FilePath::move(const FilePath &, MoveType, bool) const src/cpp/shared_core/FilePath.cpp:1578
Standard output:
[No output emitted]
Logs
/Users/bolea/.local/share/rstudio/log/rsession-bolea.log
2026-05-06T20:13:09.189134Z [rsession-bolea] WARNING [onBackendStderr]: Chat backend stderr: AI SDK Warning (anthropic.messages / claude-sonnet-4-6): unsupported reasoning metadata; LOGGED FROM: void rstudio::session::modules::chat::(anonymous namespace)::onBackendStderr(core::system::ProcessOperations &, const std::string &) src/cpp/session/modules/SessionChat.cpp:4438
2026-06-05T20:14:35.701637Z [rsession-bolea] WARNING [onBackendStderr]: Chat backend stderr: AI SDK Warning: System messages in the prompt or messages fields can be a security risk because they may enable prompt injection attacks. Use the system option instead when possible. Set allowSystemInMessages to true to suppress this warning, or false to throw an error.; LOGGED FROM: void rstudio::session::modules::chat::(anonymous namespace)::onBackendStderr(core::system::ProcessOperations &, const std::string &) src/cpp/session/modules/SessionChat.cpp:4608
2026-07-06T13:49:59.767071Z [rsession-bolea] ERROR CLIENT EXCEPTION (rsession-bolea): (TypeError) : Cannot read properties of null (reading 'document');|||org/rstudio/core/client/dom/WindowEx.java#151::getDocument|||org/rstudio/core/client/widget/DynamicIFrame.java#106::getDocument|||org/rstudio/studio/client/workbench/views/source/editors/text/ChunkOutputFrame.java#106::run|||com/google/gwt/user/client/Timer.java#124::fire|||rstudio-0.js#-1::anonymous|||com/google/gwt/core/client/impl/Impl.java#296::apply|||com/google/gwt/core/client/impl/Impl.java#335::entry0|||rstudio-0.js#-1::anonymous|||Client-ID: 33e600bb-c1b1-46bf-b562-ab5cba070b0e|||User-Agent: Mozilla/5.0 (Macintosh Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) RStudio/2026.05.0+218 Chrome/146.0.7680.216 Electron/41.5.0 Safari/537.36