Relinking Files causes Crashing

I'm working on a larger project containing many videos and since I edit on my laptop I keep all my footage on an external Hard Drive. Usually this is issue free and it has been working with this project too, but now suddenly it struggles to relink back to the files and can't find them (they haven't been relocated) when I open the project with the hard drive plugged in. 

So when I try to relink (Both with the popup message when opening, as well as manually file by file) Hitfilm crashes and doesn't find them... Importing new Files still works normally. Any suggestions?

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