Blue payment button not showing the word "payment "
I've inserted the PayPal button from the url given by PayPal Express checkout. When choosing to pay by card instead of using paypal account, the blue button at the bottom is not showing properly. The word Payment is missing so users aren't completing the action properly. Why is this button not showing properly? Also I get a pop up when using PayPal account but not when using credit card. I've checked the plugins, themes. Nothing. I need help on these 2 points, please.