This question have been asked like million times, but I have tried those solutions and still can\'t find out why this error is coming up:
Access to the path \'\\serv
If anonymous authentication is enabled on your server set read permissions for the IUSR account. To allow access for the application pool identities set read permissions for IIS_USERS group. For UNC-path sure that there are relevant permission for your shared folder (see https://technet.microsoft.com/en-us/library/cc726004(v=ws.11).aspx for details).