Add this code to the Custom CSS field on the Settings tab of your Blog widget’s settings:
[class*="Popup"] svg {
visibility: hidden;
}
[class*="Popup"] button[class*="PopupClose"] {
background-color: transparent !important;
}
[class*="Popup"] button[class*="PopupClose"]:before {
content: "Close";
font-size: 14px;
color: #000;
}
Result:
