NLUUG has been so kind to continue mirroring our new repository.
The old repositories were removed from this mirror. Please, change your sources as mentioned in the support links:
HE to Jessie upgrade
BE to Wheezy upgrade
BE to Jessie upgrade
I’m working on an adapted Update Manager to automate the selection of the new mirrors but in the mean time you can replace the following line in /etc/apt/sources.list if you wish to use the Dutch mirror:
deb http://repository.solydxk.com/ solydxk main upstream import
deb http://ftp.nluug.nl/os/Linux/distr/solydxk/repository/ solydxk main upstream import