We have have Elastix 1.5.2-2.3 and there are more than 50 extensions in PBX and recently we installed Elastix 2.3.0.
Now we want to migrate(Export and Import) Extensions from Old Elastix to newly install Elastix.
I downloaded the extensions from Old server

and tried to upload in new server but it gave me this message.

And when I repressed the Upload CSV file it shows me this error message although file is in .csv format.

I will really appreciate input. !!!!!!!!!