The Weekly timer works with the Webserver at my place too. Maybe it’s a problem of the used browser.

The manual tells:

“Supported network explorers

The LOGO! Web server supports the following Web browsers:

• Microsoft Internet Explorer with minimum version 11.0 and later versions

• Mozilla Firefox with minimum version 30.0 and later versions

• Google Chrome with minimum version 45.0 and later versions

• Apple Safari with minimum version 10.0 and later versions

• Opera with minimum version 42.0 and later versions

Note

Make sure you do not disable cookies on your browser.“