Erp-u9 V5.0 has reported an "HTTP response error when downloading patches." This may be due to the fact that the service endpoint bindings are not using the HTTP protocol. This may also be caused by the server aborting the HTTP request context (possibly due to a service shutdown). For more information, see Server logs. exception.
Most likely because IIS has insufficient permissions, the solution is as follows:
IIS Manager--Application pool--Select target app pool--Advanced settings--process model----and custom account----Input native Administrator level user name, password, The configuration is as follows:
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This article is from the "Sincano" blog, make sure to keep this source http://sincano.blog.51cto.com/12303450/1902585
Workaround this may be caused by a service endpoint binding not using the HTTP protocol