Grist fails to parse excel file - requires read access

I am trying to import an excel file saved locally on my Windows machine into Grist desktop. I get this error:
13:46:52 Error invoking remote method ‘import-document’: Error: Failed to parse Excel file. Error: [Sandbox] PipeFromSandbox is closed: [pyodide error] NotCapable: Requires read access to “C:\Users\USERNAME\AppData\Local\Temp\grist-tmp–29320-iscbtK8kyBeG”, run again with the --allow-read flag at Object.lstatSync (ext:deno_fs/30_fs.js:420:3) at Object.lstatSync (ext:deno_node/_fs/_fs_lstat.ts:18:25) at Object.getMode (file:///C:/Program%20Files/Grist%20Desktop/resources/app.asar.unpacked/core/sandbox/pyodide/_build/worker/node_modules/pyodide/pyodide.asm.js:9:182224) at Object.mount (file:///C:/Program%20Files/Grist%20Desktop/resources/app.asar.unpacked/core/sandbox/pyodide/_build/worker/node_modules/pyodide/pyodide.asm.js:9:181921) at Object.mount (file:///C:/Program%20Files/Grist%20Desktop/resources/app.asar.unpacked/core/sandbox/pyodide/_build/worker/node_modules/pyodide/pyodide.asm.js:9:210543) at GristPipe.copyFiles (file:///C:/Program%20Files/Grist%20Desktop/resources/app.asar.unpacked/core/sandbox/pyodide/pipe.js:102:27) at eventLoopTick (ext:core/01_core.js:187:7) at async GristPipe.mountImportDirIfNeeded (file:///C:/Program%20Files/Grist%20Desktop/resources/app.asar.unpacked/core/sandbox/pyodide/pipe.js:77:7) at async main (file:///C:/Program%20Files/Grist%20Desktop/resources/app.asar.unpacked/core/sandbox/pyodide/pipe.js:145:5) { name: “NotCapable” }

Any idea on how to fix this? Thank you!