# Connection problems **URL:** \ **Category:** Support\ **Tags:** raspberrypi, english\ **Created:** [February 28, 2025, 10:03am UTC](https://forum.yunohost.org/t/connection-problems/35703 "2025-02-28T10:03:36Z")\ **Posts on this page:** 1\ **Showing post:** 10
**Author:** ![jarod5001](https://forum.yunohost.org/user_avatar/forum.yunohost.org/jarod5001/32/5323_2.png) [@jarod5001](https://forum.yunohost.org/u/jarod5001)\ **Post date:** [March 1, 2025, 10:35pm UTC](https://forum.yunohost.org/t/connection-problems/35703/10 "2025-03-01T22:35:25Z")
There are some topics on the forum having the same issue : > [@Can't update DynDNS](https://forum.yunohost.org/t/cant-update-dyndns/35261/3): > > Solved: this turned out to be an issue with CryptPad: after uninstalling CryptPad I could successfully update my DynDNS > [@Bookworm migration problems, yunohost package fails to upgrade](https://forum.yunohost.org/t/bookworm-migration-problems-yunohost-package-fails-to-upgrade/34632/3): > > I think I’ve solved this: I had an entry under /etc/yunohost/domains which had no default\_app: set. That appears to be the NoneType in question: having populated that, regenerating works. I did check prior to this and yunohost domain info \ shows the app correctly, but it has to be in the file too. After that, upgrading the package works again. So I’ve re-ran sudo apt-get dist-upgrade and let that finish, which it has done successfully. After rebooting things were fine. > [@\[SOLVED\] DynDNS does not update after external IP changed, cannot force it either](https://forum.yunohost.org/t/solved-dyndns-does-not-update-after-external-ip-changed-cannot-force-it-either/31911/4): > > Problem fixed, I had to delete my domain, and re-activate it to make the updates work for dyndns. get a .local domain move all apps to the .local domain make sure you have your domain recovery password, if not create a new one in the interface remove the domain and any of it’s sub-domains. 5.add a new domain with the same name as your old one (as I wanted to keep the name) 6.renew your let’s encrypt certificate enjoy your recovered access to your server. Good luck > [@DNS problems on one server after migration](https://forum.yunohost.org/t/dns-problems-on-one-server-after-migration/31845/5): > > Here’s what I did to fix the issue: get a .local domain move all apps to the .local domain make sure you have your domain recovery password, if not create a new one in the interface remove the domain and any of it’s sub-domains. 5.add a new domain with the same name as your old one (as I wanted to keep the name) 6.renew your let’s encrypt certificate enjoy your recovered access to your server. Good luck --- _[View the full topic](https://forum.yunohost.org/t/connection-problems/35703)._