Plugin install error

petemonea

I cant seem to install the core plugins (slider revolution & WP Bakery) without getting error as follows

Download failed. cURL error 56: OpenSSL SSL_read: SSL_ERROR_SYSCALL, errno 104

I have contacted our hosting provider and we cant seem to find fault - they suggested manual installation of the plugins - where is best place to find the files to do this

or any other options?

Thanks,

Pete