When I want to put a Excel Document to my Favorites, Office Tab will give me an Error Message (see Picture)
Ond enw fy Nogfennau yw :
"Syniad Ystadegau Umsatz Hochrechnung 2020.xlsx"
Ble mae'r Broblem? Does dim nodau sy'n cael eu gwahardd ??
Diolch am eich ateb.