paperless-ngx v3 refuses to migrate from anything before v2.20.15 (paperless.E002). 2.20.15 already covers the API version range the iOS app needs, so it fixes the phone upload issue without the v3 breaking changes.
paperless-ngx v3 refuses to migrate from anything before v2.20.15 (paperless.E002). 2.20.15 already covers the API version range the iOS app needs, so it fixes the phone upload issue without the v3 breaking changes.