I think a large part of the problem is that they're building renewable power as fast as they can, but are still heavily reliant on Russian gas for electricity. So building this data center would increase their reliance on Russia.
Or pay for non-Russian gas?
The energy network has some issues. It needs a lot of work to be upgraded. Salary of technical engineers in semi-government is maxed and there is a shortage or workers at the infrastructure companies. Then there is a first come first serve rule for new connections which causes sun farms to go where the land is cheap, which is often the opposite area from where energy is used.