{"record":{"id":"e1a87e9084c9bead","repo":"remotion-dev/remotion","slug":"could-not-insert-element","errorCode":null,"errorMessage":"Could not insert Element","messagePattern":"Could not insert Element","errorType":"exception","errorClass":"Error","httpStatus":null,"severity":"error","filePath":"packages/browser-studio/src/browser-studio-operations.ts","lineNumber":2162,"sourceCode":"\t\t\t\tif (getProject() !== project) {\n\t\t\t\t\tthrow new Error(\n\t\t\t\t\t\t'Project changed during Element installation. Please try again.',\n\t\t\t\t\t);\n\t\t\t\t}\n\n\t\t\t\tconst nodePathMutation = controller.applyMutation({\n\t\t\t\t\ttimelineSelection: null,\n\t\t\t\t\tfileName: insertion.filePath,\n\t\t\t\t\tmutate: () => nextProject,\n\t\t\t\t\tnodePathMutationFiles: [\n\t\t\t\t\t\t{\n\t\t\t\t\t\t\tabsolutePath: insertion.filePath,\n\t\t\t\t\t\t\tremappings: insertion.nodePathRemappings,\n\t\t\t\t\t\t},\n\t\t\t\t\t],\n\t\t\t\t});\n\t\t\t\tif (nodePathMutation === null) {\n\t\t\t\t\tthrow new Error('Could not insert Element');\n\t\t\t\t}\n\n\t\t\t\treturn {success: true, nodePathMutation};\n\t\t\t} catch (error) {\n\t\t\t\treturn {\n\t\t\t\t\tsuccess: false,\n\t\t\t\t\ttype: 'error',\n\t\t\t\t\treason: error instanceof Error ? error.message : String(error),\n\t\t\t\t\tstack: error instanceof Error ? (error.stack ?? '') : '',\n\t\t\t\t} satisfies InsertElementResponse;\n\t\t\t}\n\t\t},\n\t\tinsertJsxElement,\n\t\tinsertSolid: insertJsxElement,\n\t\tkeyframes,\n\t\tpackageInstallation,\n\t\tprepareElementInstall: async (request) => {\n\t\t\ttry {","sourceCodeStart":2144,"sourceCodeEnd":2180,"githubUrl":"https://github.com/remotion-dev/remotion/blob/b2f4e34732f3c6c222ea029413e22dc402218cd7/packages/browser-studio/src/browser-studio-operations.ts#L2144-L2180","documentation":"Surfaced by insertElement in @remotion/browser-studio (as `{success: false, type: 'error', reason}`) when the full installation pipeline — dependency resolution, JSX insertion, element file write — succeeded in memory, but `controller.applyMutation(...)` with node-path remappings returned null, so nothing was committed. Same failure class as 'Could not insert JSX element': the controller could not reconcile the node-path remappings with its tracked state.","triggerScenarios":"Calling `insertElement(...)` while the controller's tracked node-path state is stale or diverged from `project.files`; concurrent insertions; installing an Element right after an operation whose remappings were not applied.","commonSituations":"Installing Remotion Elements from the gallery into an embedded Browser Studio session; rapid successive installs; session resumed after a project reload with stale controller state.","solutions":["Retry the insertElement once after re-reading current project state","Ensure inserts are serialized (await one before starting the next)","Check `res.type` in the failure response and surface `res.reason` to the user","If it persists on a freshly created project, capture the element payload and report a bug"],"exampleFix":"// before\nconst res = await operations.insertElement(request);\n\n// after\nlet res = await operations.insertElement(request);\nif (!res.success && res.type === 'error' && res.reason === 'Could not insert Element') {\n  await resyncProjectState();\n  res = await operations.insertElement(request); // one retry with fresh state\n}\nif (!res.success) showToast(res.reason ?? 'file conflict');","handlingStrategy":"validation","validationCode":"let res = await operations.insertElement(request);\nif (!res.success && res.type === 'error' && res.reason === 'Could not insert Element') {\n  await resyncProjectState();\n  res = await operations.insertElement(request);\n}\nif (!res.success) showToast(res.reason ?? 'conflict');","typeGuard":null,"tryCatchPattern":null,"preventionTips":["Serialize Element installs with other mutations","After any success:false here, re-read project state before the next mutation"],"tags":["elements","insert","node-path","mutation","browser-studio"],"backgroundTag":"invalid-node-path","analyzedSha":"b2f4e34732f3c6c222ea029413e22dc402218cd7","analyzedAt":"2026-08-22T21:45:17.748Z","contentChangedAt":"2026-08-22T21:45:17.748Z","schemaVersion":2},"datasetVersion":"2026-09-14T00:17:10.932Z"}