Hi,
this instance you’re trying to connect to is using an outdated version 8.1.5 of ownCloud. A user here reported the same with such outdated versions and fixed it by using a recent one:
Hi,
this instance you’re trying to connect to is using an outdated version 8.1.5 of ownCloud. A user here reported the same with such outdated versions and fixed it by using a recent one: