The most likely reason there is a problem importing data from your spreadsheet is there may be an issue with the way the original data is formatted.
Make sure that all the Skills you are importing have unique names. If there is already a Skill in your database with the name Skill1, you will not be able to import another skill with the same name. Also, remember that each main Skill must have a row all for itself with no Subskills listed. Any Subskills for that main skill must be listed underneath in their own rows.
Refer to Import Your Data - An Overview for more details on importing your data into Jackrabbit.
We have a dedicated team to help you import your data to Jackrabbit. Contact our Import Team at Imports@JackrabbitTech.com for assistance.