@w-form:~"w-form";

.@{w-form} {
  &-item {
    margin-bottom: 10px;
  }
  &-item-error {
    .@{w-form}-help, .@{w-form}-label {
      color: #dc3545;
    }
    .w-input-inner, .w-input-inner:hover, .w-input-inner:focus.w-input-inner:hover {
      box-shadow: 0 0 0 1px #dc3545, 0 0 0 3px rgba(220, 53, 69, 0.17), inset 0 1px 1px rgba(16, 22, 26, 0.2);
    }
  }
  &-label {
    line-height: 32px;
    min-height: 32px;
    font-weight: 600;
    font-size: 14px;
    padding-right: 5px;
    label {
      display: inline-block;
    }
  }
  &-row {
    align-items: center;
    display: flex;
  }
  &-help {
    color: #C2C2C2;
    font-size: 12px;
    padding-top: 3px;
  }
}

@w-form:~"w-form";

.@{w-form} {
  &-item {
    margin-bottom: 10px;
  }
  &-item-error {
    .@{w-form}-help, .@{w-form}-label {
      color: #dc3545;
    }
    .w-input-inner, .w-input-inner:hover, .w-input-inner:focus.w-input-inner:hover,
    .w-textarea, .w-textarea:hover, .w-textarea:focus.w-textarea:hover {
      box-shadow: 0 0 0 1px #dc3545, 0 0 0 3px rgba(220, 53, 69, 0.17), inset 0 1px 1px rgba(16, 22, 26, 0.2);
    }
  }
  &-label {
    line-height: 32px;
    min-height: 32px;
    font-weight: 600;
    font-size: 14px;
    padding-right: 5px;
    label {
      display: inline-block;
    }
  }
  &-row {
    align-items: center;
    display: flex;
  }
  &-help {
    color: #C2C2C2;
    font-size: 12px;
    padding-top: 3px;
  }
}

Modify the textarea error style.
style(Form): Modify the textarea error style.
