Installation and server related problems

I'm trying to add buttons for "Font size" and Font Color" on the WYSIWYG bar for multichoice and single choice questions.  I am using the following code and can add TAGS easily enough but I'm unable to add "FONT" related settings, does anyone please know the correct syntax for this:

I facing a strange issue with the H5P interactive videos, we have around 150 videos on our site. Whenever someone watches those videos, after 1 or 2 videos WordPress stops working and it gives an error Fatal error: Out of memory (allocated 27262976) (tried to allocate 32768 bytes) even after having sufficient resources. To resolve this we have to restart the XAMPP services.

Here is more info about the server and the status of the server during this white screen of death.
System : Windows Server 2012 R2 Standard Edition (VM instance)
Memory used by PHP : 2 MiB

I have just installed H5P on a Moodle 3.6.2 installation running on IIS.

All is working Moodle wise, but when I try and add "interactive content" the Editor section is showign "Waiting for Javascript..." and not loading, after many attempts and changing the ASP anon authentication to app pool that I saw someone else do, it is now showing "Loading please wait...". I am still unable to access the H5P editor.

Any help would be greatfully appreciated.

Thanks,

Tom