Paypal donation code

Try getting the button from the source in:

https://www.ads-software.com/donate/

Change the URL in the code as required.

Are you improperly copying the code? Validates fine here.

https://www.viper007bond.com/wordpress-plugins/alphabetical-plugins/
https://validator.w3.org/check?verbose=1&uri=https://www.viper007bond.com/wordpress-plugins/alphabetical-plugins/

I have to add some / so the end of img tags but that was all.

Mmm, now that I think of it, yeah, I had to do that to my image and input tags as well.

Thanks all!

I added the / sign and it works ??

Here is some steps you can take:
https://www.webmaster404.com/wordpress-paypal-integration/