I have solved all W3C errors of this theme, except for 1. I cannot find the solution for this one:

Validation Output: 7 Errors

1. Line 354, Column 194: No space between attributes.

   …login.php" data-color-override="false"data-hover-color-override="false" data-h…

   ✉

2. Line 375, Column 116: No space between attributes.

   …/website/" data-color-override="false"data-hover-color-override="false" data-h…

   ✉

3. Line 385, Column 116: No space between attributes.

   …/webshop/" data-color-override="false"data-hover-color-override="false" data-h…

   ✉

4. Line 408, Column 134: No space between attributes.

   …alisatie/" data-color-override="false"data-hover-color-override="false" data-h…

   ✉

5. Line 417, Column 99: No space between attributes.

   …  href="#" data-color-override="false"data-hover-color-override="false" data-h…

   ✉

6. Line 426, Column 124: No space between attributes.

   …arketing/" data-color-override="false"data-hover-color-override="false" data-h…

   ✉

7. Line 435, Column 121: No space between attributes.

   …al-media/" data-color-override="false"data-hover-color-override="false" data-h…

There are 7 of these errors in total, and they are all applicable on the Nectar Buttons. Does anyone have the solution were I can find this piece of code to edit it?

Thanks, I found the error and resolved it.