118: Data-URI link without description
You need to provide a link text when creating a link with a data URI. The link text is missing in your case.
Solution
Prepend a word or a string of words to the arrow like in the following examples:
A smile->data:;charset=UTF-8;base64,4pi6 is worth a thousand words.
Here is `a link text with spaces`->,QSBsb25nIGxpbmsgdGV4dCB3aXRoIHNwYWNlcw==.