Login Security Solution – error

When trying to add a new user or change an existing user’s password, I receive the following errors:

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Warning: exec() has been disabled for security reasons in /home/***/public_html/wp-content/plugins/login-security-solution/login-security-solution.php on line 1341

ERROR: Password is too common.
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However, I am using a 15 character string, inclusive of upper an lower case letters, numbers and symbols.

In my settings, the character minimum is set to 12.

I tried removing the function call but this caused more issues.

If anyone has had the same problem or knows of a solution, please let me know.

Thanks