Google updated their phishing method and all subdomains of sharefile.eu are affected.
This has been documented by Citrix on CTX307860
The current workaround is to use Microsoft Edge to access the sharefile website in the interim.
VS Qloud has developed another workaround as it seems that the issue seems to be logo related. Google seems in some kind to compare the logo to other existing websites and the new algorithm is marking it as phishing.
In other words, remove your custom logo and the website gets displayed again without warnings