Inspecting the extension I can see this:
POST
https://api.openai.com/v1/vector_stores 400 (Bad Request)
fetchWithTimeout @ popup.bundle.js:60
makeRequest @ popup.bundle.js:60
await in makeRequest (async)
request @ popup.bundle.js:60
methodRequest @ popup.bundle.js:60
post @ popup.bundle.js:60
create @ popup.bundle.js:60
(anonymous) @ popup.bundle.js:80
popup.bundle.js:82 error Error: 400 Files with extensions [.jpg, .png] are not supported for retrieval. See
https://platform.openai.com/docs/assistants/tools/file-search/supported-files
at Qt.generate (popup.bundle.js:60:28636)
at bi.makeStatusError (popup.bundle.js:60:41168)
at bi.makeRequest (popup.bundle.js:60:42091)
at async popup.bundle.js:80:169021
at async yc (popup.bundle.js:80:168768)
at async bc (popup.bundle.js:80:169448)
at async popup.bundle.js:80:180261