Uncaught TypeError: a.data.split is not a function in d.xd_parser (library.js?lang=it:108:65)

[gfplab-scaffardi]

Hi There! I'm using the oneall social login on my phpbb 3.3 forum https://www.sognilucidi.it/forum and into the console i see many of these errors:

Uncaught TypeError: a.data.split is not a function
at d.xd_parser (library.js?lang=it:108:65)
at d.xd_listener (library.js?lang=it:108:197)
at library.js?lang=it:85:87
at c (library.js?lang=it:13:208)

This is the code at that line:

if ("undefined" !== typeof a.data && (a = a.data.split("::"),2 === a.length)) {

Why that? Is there a way to fix it?