rene-s/Seafile-PHP-SDK

### Expected behaviour

### Actual behaviour

### Steps to reproduce the behaviour

### Other helpful information

#### Which call are you making?

#### Do you have permissions to create a new directory?

#### Do you have permissions to read the directory?

#### Does the Seafile server work OK otherwise?

#### Did you obtain an API token from the server and has it been stored correctly?

#### Which branch or tag of the Seafile-PHP-SDK are you using?

#### Which PHP version are you using?

#### What is the version of the Seafile server you are using?

#### Is the OS you are using Seafile-PHP-SDK on 32 bits or 64 bits?

#### Are there error messages in the Seafile server's log files? If so, please post them.