No, they can't fix it. It can easily take months. The plants are broken and need replacement parts they don't currently have access to. Instead, they are imprisoning opposition members and journalists because they now have the perfect excuse. "Sabotage!", they scream, and Maduro calls for criminal gangs to intimidate and murder the opposition.

In the first link, you can see that they aren't even trying to transparently solve the issue. They are blocking specialists from accessing any information and are kicking out employees. They want to keep Venezuela in the dark and use it as an excuse to be even more violent and authoritarian.