Es sieht so aus, als ob es ein Speicherproblem ist:
Also mein erster Versuch wäre die NVMe SSD durch ein anderes Speichermedium zu ersetzen. Bevor du das tust, könntest du versuchen, die NVMe SSD erneut in den Slot einzusetzen, einen anderen Slot zu nehmen und die NVMe Kontakte auf Beschädigungen zu überprüfen.
There is also Carrier Grade NAT, which basically means that you share an IP with other customers, so if you try to access your network from the outside, you will only end up at your ISP's router, where the network is divided up for a group of customers.
Then I don't know, I've set up several Wireguard VPNs on several Fritzboxes and everything works fine.
No, I specifically meant dynamic, because most ISPs only give static IPv4 for business plans, and a dynamic IP is fine if you use a dynamic DNS service (the Fritzbox has one).
But does port forwarding work for you, can you access your servers from outside your network?
If not, it's probably carrier-grade NAT. There are several ways to fix this:
There is the Nibelungen saga, a Germanic folk tale. It is too complex to give a short summary. Part of it is the heroic story of Siegfried, the dragon slayer.
It is western and well known in Germany, but judging by the lack of English sources, not very well known elsewhere. For more, I recommend reading the German Wikipedia entry (with translation)
Was machst du bei Parkour so?
Meiner Erfahrung nach geht das von wirklich sehr entspannt (z.B. Balance Training und Spot erkunden) bis absolutes Hammer Workout (z.B. letztens 100 Climb-Ups so schnell wie möglich + mehr)