Hello Satoshi, You must start uploading to this URL within 10 minutes of its creation. Have you followed the relevant documentation page <https://cloud.google.com/appengine/docs/standard/php/googlestorage/user_upload> at "Allowing Users to Upload Files" with all the steps indicated there? How did you get the 500 error, exactly?
More detail on your code and the exact steps you undertook is needed to properly organize an investigation. Whatever information you deem relevant is likely to help as well. -- You received this message because you are subscribed to the Google Groups "Google App Engine" group. To unsubscribe from this group and stop receiving emails from it, send an email to google-appengine+unsubscr...@googlegroups.com. To post to this group, send email to google-appengine@googlegroups.com. Visit this group at https://groups.google.com/group/google-appengine. To view this discussion on the web visit https://groups.google.com/d/msgid/google-appengine/393b8822-dbf2-444c-b026-8308fb6a81fe%40googlegroups.com. For more options, visit https://groups.google.com/d/optout.
