Why doesn't oss work on the pc anymore?

Sa
2

Oss (online schule saar) no longer works with our laptops, but only with a cell phone. The Wi-Fi is very fast and works, the LAN too. My friends can also come in. What's going on?

ch

What does not work does it show an error message, if so, which one?

Sa

When I want to log in, the page loads for ages and then shows that there was a loading error

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