incorrect password incorrect password with valid login details for (http)

[error 404]

incorrect  password with valid login details for non secure url. 

 

i am facing this issue at my whmcs. clients can't login with Their valid details. 

 

when i check ssl. i have found a mixed content.

 

Form Failure

 

A form with the action of "http://example.com/dologin.php" exists in the source code of the tested page.

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This form needs to be updated to use "https://example.com/dologin.php" or another secure URL for your padlock to return.

 

 

so how can i solve this issue??  i have attached a picture. so now what can i do for that? 

 

 

[brian!]

4 hours ago, error 404 said:

so how can i solve this issue?? 

are you using a https address in your System URL, logo and domain settings in setup -> general settings -> general ??