The project file could not be loaded. Data at the root level

Question

Suddenly I cannot open my project ;(. I'm using visual studio 2015. Below is the error messages:

 

E:\Programming Files\April 21 2018\SYSTEM SOFTWARES\SYSTEM SOFTWARES\DhipayaSystem\DhipayaEci_V2\DhipayaReportingServices\DhipayaReportingServices.rptproj : error  : Could not find file 'E:\Programming Files\April 21 2018\SYSTEM SOFTWARES\SYSTEM SOFTWARES\DhipayaSystem\DhipayaEci_V2\DhipayaReportingServices\DhipayaReportingServices.rptproj'.

E:\Programming Files\April 21 2018\SYSTEM SOFTWARES\SYSTEM SOFTWARES\DhipayaSystem\DhipayaEci_V2\DhipayaEci\DhipayaEci.csproj : error  : The project file could not be loaded. Data at the root level is invalid. Line 1, position 1.  E:\Programming Files\April 21 2018\SYSTEM SOFTWARES\SYSTEM SOFTWARES\DhipayaSystem\DhipayaEci_V2\DhipayaEci\DhipayaEci.csproj.user

E:\Programming Files\April 21 2018\SYSTEM SOFTWARES\SYSTEM SOFTWARES\DhipayaSystem\DhipayaEci_V2\DhipayaEci\DhipayaEci.csproj : error  : The project file could not be loaded. Data at the root level is invalid. Line 1, position 1.  E:\Programming Files\April 21 2018\SYSTEM SOFTWARES\SYSTEM SOFTWARES\DhipayaSystem\DhipayaEci_V2\DhipayaEci\DhipayaEci.csproj.user

Did anyone experience this before? Any help would be appreciated.