Today I have received the below error while importing the solution in CRM. I was not able to get anything by seeing the error as the information given was not helping to find the exact error and fix it.
After some search able to find the fix.
1) Extract the Solution zip file.
2) Open Customizations.xml in a XML Editor (I normally use Visual Studio)
3) Search for “ascending” and remove this text “ascending=”true” whereever you find it.
4) Zip the components and import again. You will not get any error this time.
Hope this helps.