Hi there, I am sure that the main package does not contain any viruses or malware so there should be nothing to worry about.
The “POST Content-Length” error should be something related to hosting and it is advised to contact them when you encounter errors.
I think your theme probably partially uploaded. Can you do the upload again please since from the errors it says that some files are missing. Try to do it over FTP and put the contents of kleo.zip file in wp-content/themes/kleo
Let me know how it goes
Cheers
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