So I had this glitch where I couldn't buy anything. When I tried to upgrade turrets and hulls it wouldn't upgrade it. And when I tried to buy supplies, when it asked me to confirm and I clicked "Yes", the supply wasn't added to my Garage. The glitch started when I tried to equip and upgrade Viking and ended when I bought a new paint. I was then able to buy supplies and upgrades as normal afterward.
Customer support service by UserEcho