After a lot of searching online, it seems that the problem I ran into is related to this one:
opened 03:02PM - 26 Mar 14 UTC
closed 01:16AM - 13 Jan 18 UTC
Type:Bug
sev3-medium
### Steps to reproduce
1. Create a new account on daily stable6 server with user… : user and password: aaaá
Take into account that the password has special characters.
2. Access to this new account with WebDAV protocol is not possible. Using for example POSTER (images attached)
### Expected behaviour
It is possible to access to the server daily stable6 with this account through WebDAV protocol
### Actual behaviour
It's not possible to connect with this account on daily stable6 through WebDAV protocol
NOTE 1: There is no problem on the accessing to this new account using the browser.
NOTE 2: If you create an account with a password with special characters on daily master: It is possible login using this account through WebDAV protocol.
### Server configuration
**Operating system**:
iPhone
**ownCloud version:** (see ownCloud admin page)
daily/stable6 -> {"installed":"true","version":"6.0.2.5","versionstring":"6.0.2","edition":""}
daily/master -> {"installed":"true","version":"6.90.0.2","versionstring":"7.0 pre alpha","edition":""}
### Logs
#### POSTER screenshot
With daily stable6:
With daily master:
I had a special character (a !) in my password, which seems to have caused the problem. I have changed the password and now I can write to the calendars.