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I am running macOS 10.15.7.  I downloaded PlayOnMac_4.4.3.dmg.  I tried to install a non-listed program and performed Manual installation, selected option to install some libraries using 64 bit.  Virtual drive completed and I selected POL_install_wsh57 from list, but when I clicked next I got the message that an error happend during download.  The actual file name appears to be cut off. But here is what I can read: http://download.microsoft.com/download/4/4/d/44d38a9e-630d-4c10-1f17-b9  

I retried and got the same message and when I selected cancel I got another message "Error in POL_Download_Resource error during download! Any suggestions as to how to get this to work? Thanks all!