Is this crack worrying?

[Antony100]

Hiya folks

Hoping you may have some sage advice. We had our garage converted 18 months ago. A month or.so ago we had a short circuit on the electrics for a couple sockets on the outside wall. We then noticed some condensation on one of the sockets. Now noticed these cracks in the top right corner. I attached some pics and a pic from the building work of what is behind. Are these cracks cause for concern structurally? Or just normal cracks as the plaster settles ?
Any thoughts appreciated

 

[Alastairreid]

Intertestial condensation! Was a vapour barrier installed?
The crack is where the join between the stud and concrete wall meet.

 

[Antony100]

Thanks. No I don't believe it was. I wondered if it was due to the contrast between the warm insulated stud and the uninsulated blocks. I'm guessing there's not a great deal I can do beyond ripping the wall down and putting a vapour barrier in?