lightroom crashte telkens opnieuw, ik heb het programma opnieuw geïnstalleerd, en nu kan ik niet verbinden met de server, dus heb ik geen toegang tot mijn foto's

I haven’t used Windows in many years, so bumping this thread for someone who does use Windows. 

From that message, I’d be thinking VPN, proxy server or firewall might be blocking Lightroom’s access to the Adobe servers. I might also try a mobile hotspot just in case there’s some kind of blockage at your router level. 

This question would be best asked in the Lightroom Ecosystem forum. This is the Lightroom Classic forum. 

https://community.adobe.com/lightroom-ecosystem-cloud-based-677/index2.html

Do you have a solid, active internet connection?