Fix Metasploit error "The following options failed to validate: RHOSTS"

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Fix Metasploit error "The following options failed to validate: RHOSTS"

When setting RHOSTS you might encounter this error.

msf auxiliary(syn) > set RHOST 10.10.0.7

RHOST => 10.10.0.7

msf auxiliary(syn) > run

[-] Auxiliary failed: Msf::OptionValidateError The following options failed to validate: RHOSTS.

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